We are looking for a new provider to host our Rails site -- we have
outgrown our current provider (for the past 4 years) since our business
is beginning to take off in a big way this year.
Which provider (e.g. Rackspace, Engine Yard, Heroku, Serverbeach, etc.)
would you recommend to run a highly scalable site?
FYI, we currently have over 150,000 users that will likely grow to a
million in the next year.
Thanks in advance.