Trouble with web, articles can change, because I know that Early 2008 MacBook WAS in fact on the Vista 64-bit list at one point, then in Late 2008 the MacBook was dropped. Was that too confusing? did someone change their mind? Who knows?
Macs support 64-bit Vista:
http://support.apple.com/kb/HT1846
If it works for you, fine. Vista 32-bit should but hasn't for many, provided 3GB RAM.
I am use to Mac Pro users, so when I hear heavy or lot of video and such.... on a MacBook...