After installing Vista on my office laptop, I was amazed(rather fooled by the glossy appearance ) by the UI.

After coming home, I installed the Sonic wall VPN client and tried setting up a connection and guess what ....It Bombed !!!
After much research I was shocked to find out that Sonic Wall dint have a Vista compatible version!!

I was able to find an URL for the beta version of Sonic wall that actually works with Vista! Here is the URL

http://software.sonicwall.com/Applications/DataProtect/GVC40Beta.html

Good Luck!

Hope this helps someoneJ