I heard from a friend of mine at Object Partners that JRuby was being used with Spring and Hibernate for rapid prototyping of applications, and today I stumbled across a blog entry by the guy that's doing it.
Bogle’s Blog » Ruby On Spring...

We're on for the second meeting of the Twin Cities Ruby Users Group (official name pending). The details are available on the group's home page, but the basics are that it's at Digital River in Eden Prairie, Minnesota, on January 31st at 7:30PM CST. We're hoping to have a big...

I think it's perfect to start this blog with some good news: Tom Enebo and I have been accepted to present JRuby at this year's JavaOne conference. It will be a technical session (yay!) and we hope to pack in as much practical and technical information as possible on all...

I've been up for 24 hours, working on JRuby for about 20 of those. I thought it might be a good time to start a tech blog of my own.
More to come...