Ask YC: Ruby Hosting
Where are you hosting your Ruby Apps?
I used this resource when choosing a hosting provider:
answer: buy a VPS. the most popular one seems to be slicehost.
I don't want to be the UNIX admin for my VPS when I'm focused on development. So a REALLY important feature of any hosting provider for me is the ability to start on a $5 shared server account, and eventually ramp it to a 1024MB VPS, painlessly.
just my $0.02, though.