Steve,
In regards to the domain name, try entering "CD32" into the box at directnic.com and it'll show you hundreds of possible variants for you to purchase. DirectNIC isn't the cheapest Internet registrar out there, but they do have the easiest system to use and I've never had any trouble out of the 18 domains that I've registered through them (admittedly, I used to work for them, but I still like their system the best)
In regards to hosting, if you're going to put together a site like amiga.org, I highly recommend our current host, planetxoops.com. They're cheap, they seem to know what they're doing, I love the admin interface they use (CPanel X) and they've been very helpful to us. If you write them, mention us and they'll be more than happy to help you as well.
Wayne Hunt
Amiga.org