I first used Rails in 2005, though I'm not sure I can legitimately claim
to have 5 years of experience. I'm also not actively seeking full-time
employment, though I'd be happy for short-term contract gigs.
I'm not sure how well this will go over with the PHB types, but I think
it's important to emphasize that a good programmer can pick up a new
language or framework fairly easily, especially if it has many
characteristics in common with something they already know; a good
programmer who knows Python and Django should be able to start writing
useful Ruby/Rails code in a day and be reasonably productive in a week.
Someone with a background in PHP or Java might have a bit longer ramp-up
period, but it is my contention that programmers who can't pick up Ruby
probably aren't good programmers in whatever languages they do know.
Hiring programmers is usually hard due to the large percentage of bad
applicants. Requiring Ruby might cut that down a bit. To really go all
the way, require Haskell, but use Ruby.