As I won't be able to make it, some of my thoughts:
1) awesome work so far and excellent list
2) versioning is one of the most useful practical features of GAE in my opinion, when used in production solutions. Would love to see it make the list. And suspect it would be very popular.
3) resume on reboot: I'm assuming is state persistence and automatic resumption of service? If so YES PLEASE! Sorry to shout, but this is massively important for production use. Big vote from me on that
Loving seeing more focus on filer. I've not played with what's there yet, so won't comment. But again, another big focus for those of us wanting to make big scalable services :)
It's a pleasure watching you guys work on this.