First impessions of mono

I've never really been much of an open source guy, but damn if I'm not ecstatic about mono. I've been following the project for a while and loved the concept, so when it came time to re-write this web project I'm working on (originally written in PHP) I though it's the perfect opportunity. Right now we've got mono 1.2.6 running on an ancient machine with CentOS 4.4, and mono itself seems...