Russ is using Orion - great! It really is a kickass server. FYI we run all our Orion instances in production using Daemontools which is a really cool 'services' style system for *ixes. [The Rebelutionary]
Nice, I'm going to take a look at it now. Thank you very much, Mike!
I'm definitely not a Unix-admin head, by the way, so any tips on making my server the most robust is more than welcome. My general rule is to keep as few services running as possible, and keep links to tutorials so you can remember what you did 6 months from now.