So, after far too long, I''m running successful tests of an IOWA/Mongrel integration. This is using Mongrel 0.3.13.3. I created an app that is the same as the one tested here: http://blog.kovyrin.net/2006/08/28/ruby-performance-results/ Just running a single mongrel on an AMD Athlon (2 Ghz) dual processor system with a Linux 2.4 kernel and Ruby 1.8.4 I get, with a concurrency of 1, around 345 requests per second. Higher concurrencies remain manageable, though, which is nice to see. I get around 270/second with a concurrency of 100, for instance. This is reasonably fast. For comparison, going through Apache 2 with a mod_ruby handler, I get 240/second with a concurrency of 1, and it peaks at around 370/second with a concurrency of 3 before going down. Apache was floundering with a concurrency of 100 so I aborted that test. This is running in prefork mode, BTW. So....not bad at all! Kirk Haines