A bit of downtime as I upgraded to OSX 10.5 Leopard. It is very nice and shiny. It also comes with rails pre-installed, which is good.
Unfortunately that confused me a touch as how to get my site back up and running. I wasn't sure about mysql, but the 10.4 package works fine. Also the default rails install works, but I've heard worrying things about installing gems so I've just installed the ones I need manually in the Rails Vendor location. Woohoo, I'm back-up - although I'll have to check the Leopard firewall isn't interferring.