Does MobileMe’s Push Email Really “Push?”

When Steve Jobs first announced “push email” for the upcoming iPhone 2.0 software, I was skeptical.  The two protocols I knew of, POP3 and IMAP, operate on a protocol that is always initiated by the client.  The user has to continuously check in with the server to see if new messages have arrived.  With POP3 and IMAP, you can approximate push email by polling server several times a minute.  I figured that Exchange supported some sort of persistent connection that allowed push, but from the way it was presented at Steve’s keynote, it seemed that they were touting push email for any mail account accessed by an iPhone.  I wrote off “push email” as a marketing ploy.  Im my mind, the mail server would have to know where the client was at all times to “push” updates.

Well, it turns out that MobileMe supports Push-IMAP, a relatively new protocol.  The way it works is a client logs into the MobileMe server with a long-lived HTTPS connection.  Through this connection, the client sends any updates to the server.  The server sets up a long-lived response to send back notifications of new messages.  Data is compressed to help lower bandwidth requirements.  P-IMAP is an open protocol and a P-IMAP to IMAP bridge can be set up to allow legacy mail servers to provide push services.  In addition to email updates, P-IMAP allows other data, such as contacts and calendars to be synchronized.

What seems surprising to me is that Apple is going to have to set up a system that will have to handle millions (well, at least thousands) of simultaneous connections.  Let’s hope they can do it!

So, is MobileMe’s push really “push?”  Well, technically, no.  The client still has to initiate and maintain a connection to the server.  If the server kept track of what IP address each iPhone had and initiated connections out to each iPhone, it would be a true push system.  In reality it’s a more scalable way to handle continuous polling.

 

More information:

P-IMAP

Happiness

A book I still have to read is [ed. I think it was called] The Science of Happiness whose author was interviewed recently on NPR.  The interviewers discussed the emerging branch of psychology that is studying happiness.  It got me thinking about how perceived happiness is a major market factor and how people now days are more willing to pony up extra cash and make an effort to buy your product or service if it causes them some happiness beyond the satisfaction of having a need met.  

There are so many examples of this:

Apple is the most obvious candidate.  Sure, you can buy and build a computer using the same parts Apple does for half the cost.  You can install Linux for free or pay for Windows and get your work done.  Why are people paying more for Macs?  The Mac OS and Apple’s software suites offer a more user-friendly and, ultimately, satisfying experience.  Apple’s users (like me) are happier.  

37 Signals recently posted about Zingerman’s deli in Ann Arbor and the philosophies they follow that make them a great company.  Yes, you pay $20 for a reuben and a root beer, but the experience of going to the deli outshines many other casual eating experiences.  Customers are showered with free samples of exotic foods and the staff are very personable.  The selection of products is also far beyond what you’d find in many other places.

This also brings to mind Ruby on Rails.  There are plenty of other MVC frameworks out there that do the same exact thing as Rails.  But there are so many positive externalities that Rails offers that put it above the rest: the community, the Ruby language itself, and the way agile development is baked into the framework and its related plugins.  It really makes for a pleasant development experience.

The bottom line is that Americans are becoming more willing to pay for products that make them feel better.  This has positive repercussions where a product can benefit the natural environment or society as a whole.  The challenge is to build a brand that offers that extra bit of happiness and (ideally) really does change the world for the better.

Location, Location, Location

One of the exciting technologies that’s getting a lot of attention is location-aware devices.  The ability to post location data to the Internet is creating some very interesting applications.

A few years ago, a company came out with a device that can be embedded in a child’s clothing or backpack.  While this was a prime example of how real-time location information could lead to invasion of privacy, there have been some benign uses of the technology.

One such use is GPS-enabled cameras.  Photographers can easily keep track of exactly where each picture is taken.  Flickr added location data to photos allowing you to browse for photos from a world map.  Lately, a lot of buzz has surrounded Yahoo!’s Fire Eagle.  It’s basically a location updating service and it’s opening up some great possibilities, one of which is wikinear written by Simon Willison.  You can use your location to fetch Wikipedia articles that pretain to landmarks and events that surround you.  A blessing for history geeks!

Another commonly foreseen application is being able to hook up with (or avoid) friends that are nearby.  Some have also suggested using individuals’ location data to measure traffic on highways and in shopping malls.  I can only imagine the sort of alternative reality games that will crop up now that developers can track players’ locations.

Of course, the major impetus for all of this is the iPhone.  Not that the iPhone’s locator technology is new, but it’s finally available in an easily usable (and easy to develop for), tight package.