[kawera]

I use GAE on a few b2b, process oriented webapps of my own and also do GAE consulting for large customers.

I've met a few times with their evangelists/sales/support people in my country. They have always been very enthusiastic and are pushing very hard for adoption by large corps and universities. I don't have the impression they will pull the plug but... you never know.

As for the Premier support option, the few times I needed it they were very responsive and helpful; I do recommend it if possible.

To a solo entrepreneur like me, GAE is a great option and I can't imagine myself managing servers and a full stack, even if it is just building/deploying an AMI. GAE is just too easy.