RAR and a fresh install of Snow Leopard

I was wondering what the best way is to get RARs working with BetterZip in Snow Leopard. Do we have to download RAR from Rarlab? Is there a 64-bit version for OS X? What's the process?

Extracting rar files is built-in. To create rar files you need to download the external rar utility. There are no changes on Snow Leopard. There is no 64-bit version for Mac OS X yet, but since there are ones for Linux and Windows, I guess, it's only a matter of time.