Completely Working with no modifications:
7zip ver. 4.57
Avast Home (Free) ver. 4.8.1296
Freeciv ver. 2.18
iTunes ver. 8 (both 32bit and 64bit versions work flawlessly)
Microsoft Office 2007
Firefox 3.0.4
Nero 9.0.9.4
OpenYatzee
Picasa2
SMplayer (my favorite video player)
Texas Holdem 3d Poker Deluxe Edition
TVersity (like Windows Media Player and iTunes on Steroids)
Ultraiso 8.6.3.2056
Yahoo! Messenger ver. 9.0.0.2112
Will only work on 32bit Version of Build 7000
Vista Codecs Pack ver. 4.62 (installs flawlessly on 32bit but fails at the very end resulting in a rollback on 64 bit)
Update to Vista Codecs Pack. It seems that Version 5.09 works flawlessly on both 32 & 64 bit versions of Build 7000....hooooray
Alright I can confirm that Auslogics Disk Defrag ver. 1.5.22.345 works flawlessly on Build 7000 x64.....hooray
Update: It installs as a 32bit app (Program Files (x86)) but when you run it it uses all cores of the processor in 64 bit mode.....lightning fast. It outright smokes Windows 7's defrag.
ATI/AMD has released Catalyst drivers for Windows 7. They are beta but appear to whoop the ones on Windows Update. You can get the newest ones here:
AMD Customer Care
PS - They work perfectly on the 64bit version of Build 7000.
Photoshop CS3 is working perfectly on 64 bit Build 7000.