RailsDevelopment.com: A Directory of Rails Development Companies
The Rails Development Directory is a new site from Engine Yard that provides a listing of companies offering Rails development services. It's squarely aimed at businesses who are looking to get major development work done.
On the front page you can fill in a rough number for "your budget" then tick off a number of requirements - such as security auditing skills, SEO services, iPhone development, and so forth - before clicking a button to get a list of suitable developers:
Developers are listed in order of how many endorsements or reviews they've gotten. So far HashRocket seems to lead the field with 13 endorsements with Planet Argon on 10 and Envy Labs, Intridea, and New Leaders tying on 9. Once you've chosen your ideal providers, you can move on to filling out a "request" that will be sent to all of your choices (up to just 3, alas). It's slick, easy, and remarkably clean.
As an aside, HashRocket doesn't show up on any budget under $40k, Planet Argon won't show up for under $25k, and EnvyLabs for under $10k. If your budget is a mere $100, however, don't fear because you still get 10 companies coming back to you!