Posterous is hiring, and we love Ruby on Rails. Let me know if you'd like to talk. Perhaps we can make lemonade from these lemons. http://posterous.com/jobs
Posterous, Twitter and loads of others are great places to work.
Specific opportunities aside, I think the point made here (and elsewhere in this thread) is that there are plenty of RoR jobs in The Bay Area - and if you come out here and hang out you'll be in a job within 2 weeks.
I'm sure most of the bigger/funded startups would support the legal costs of a port on an H1b, if that is what you have.
If you go back to your old employer, which is an option, aside from the pride issue I think you would also out of professionalism owe them 3-6 months before you left again, so consider what you want to do carefully.
Good luck! :)