Afraid so. Rails got them to market, if they have to port to whatever, they should do it and I don't see why that is a big deal for anyone. I still like rails even if it can't scale to twitter.

They lost a DB server:

http://twitter.com/twitter_status

WOW - you are right. I am seeing that right now. Thats terrible. They could do a server too busy message and it would be more correct I think.