I'm just curious to know why so many people are using 64bit Vista. Most applications are 32bit only and won't run on 64bit. Also 32bit applications with 64bit compatibility actually run slower on 64bit than they do on 32bit. Genuine 64bit applications should fly along of course, but there aren't many out there.
We had a similar choice when installing 6 new Windows 2003 servers recently. We ended up with only one 64bit server (SQL) because none of the currently available software (including Exchange 2003) would run on 64bit. All the other servers are 32bit. The future may be 64bit, but that isn't going to happen for a while.
So the question remains, why did you install 64bit Vista? I read about so many people having compatability problems with 64bit just makes me wonder