LiteSpeed Web Server is a commercial product that offers a free version for private and commercial use. With release 2.2, LiteSpeed Technologies has embraced the Rails community and provided built-in support for deploying Rails Applications.
According to their website, they are “the world’s best performing Ruby SAPI and easiest Ruby on Rails application setup”. I put their claims to a test in a couple of screencasts for your viewing pleasure.
If you haven’t checked out LiteSpeed yet, give it a try.