Here’s an interesting document I found about iPhone development, via Guy Kawasaki on Twitter.

Ten23 Software built PhotoKast from scratch in a month. It says plenty about the iPhone’s development environment and distribution channel (not to mention their tenacity) that they were able to do this.

The developers have written up their process, detailing:

• Concept
• Design
• Development
• Distribution
• Monetization
• Maintenance

They also have a few things to say about why they chose the iPhone platform, and the state of the App Store. I liked this tidbit in particular:

We recently had a customer support request asking us how to move the PhotoKast icon to a different location. If you think about it, that’s pretty amazing. For a long time, most consumers didn’t understand that their devices could be used for much more than voice and text messaging. Now, even users unfamiliar with some of the basic operations of their phone were able to browse, download and launch 3rd party applications.

That’s a prime example of why the iPhone is successful as a user experience.

Check out Ten23’s development document at scribd.com. It’s 37 pages long, but well worth it if you’re considering developing an iPhone app.