I’m self-hosting a bbpress forum and tried with WordPress as well. I found this page very useful:
http://girtby.net/offerings/wordpress-osx-local-mirror
it explain how to set up a Local Mirror of your WordPress Blog on MacOS X, but everything applies to set a new one up (except copying the blog, of course!)
Also have a look at http://www.no-ip.com.
Also, you could have a look at the Theme guide on Urbangiraffe.com
