I found a couple of posts that were very interesting from a different perspective than just the “hey free web hosting” angle, that I wanted to save/share:

• Alec Saunders discusses Google App Engine as an example of the competition between Microsoft and Google, and why Google “gets it” but Microsoft doesn’t.
• Jacob Brunson thinks this is an example of Google “changing the world” — an innovative idea coming from inside Google rather than being bought by them.

And one more link that is a coding-focused one, but I wanted to save it anyway. =)

• Ronald Schouten has a great list of resources for learning Python and Django (Python being the language you must use with Google Apps Engine, and Django being one of the most popular Python frameworks for web apps).