In an email sent earlier today, Apple formally informed users on the iPhone mailing list of the device's availability come June 29th. The provided purpose of the email was to suggest some ways that prospective customers might prepare themselves for the iPhone's arrival. The actual purpose, of course was to tout the phone a bit more before June 29th as well as reach out to the few folks living in closets who aren't aware of the release date.

For those of you not on the list, the email follows:

The folks over at MacRumors received scans of a leaked copy of AT&T's workbook they are providing to their sales force to help them pitch the upcoming Apple iPhone to prospective customers. The scans were provided by an individual that reportedly does not work for AT&T or Apple, but somehow had access to the workbook. Provided the scans are legitimate, and they do appear to be, they offer up some interesting tidbits, the most noteable of which are:

At the May 30 D: All Things Digital conference near San Diego, Steve Jobs took the stage and informed attendees that Apple (AAPL) was in the process of making the Apple iPhone open to outside developers, according to MacWorld. The announcment cleared the air after months of speculation surrounding reports that the iPhone would be a completely closed platform.

In an exclusive story, Gizmodo reported today that AT&T has underway a project to boost the speed of it's EDGE network in preparation for the Apple iPhone. Based on an insider with access to AT&T operations documents, the project termed 'Operation Fine Edge' has been underway for a number of weeks now and will continue until June 15th.

The most speculated detail about the Apple iPhone is finally no longer a rumor, or an insider leak, or an unconfirmed report. Apple, in a series of new advertisements, has confirmed that their much anticipate iPhone will be available on June 29th.

The June 29th date has been rumored for some time and was widely reported over the last few weeks as the most likely of the speculated release dates.