I searched on Vista software, or some such thing, and turned up this set of lists:
http://www.iexbeta.com/wiki/index.php/Windows_Vista_Software_Compatibility_List
As best I can tell, it's the "Contents" section (and its realted listings below it) that is pertinent to RC1.
Contents
* 1 Works
o 1.1 Academic
o 1.2 AntiSpyware
o 1.3 AntiVirus
o 1.4 Backups
o 1.5 CD/DVD Authoring
o 1.6 Compression
o 1.7 Defragmenting
o 1.8 Developer Tools
o 1.9 Emulators
o 1.10 File Sharing
o 1.11 Firewalls/IDSs
o 1.12 FTP
o 1.13 Games
o 1.14 Graphics
o 1.15 Media
o 1.16 Messaging
o 1.17 Office Tools
o 1.18 VPN Clients
o 1.19 Web Browsers and Plug-Ins
o 1.20 Miscellaneous
* 2 Has problems, but they can be solved
o 2.1 Academic
o 2.2 AntiSpyware
o 2.3 AntiVirus
o 2.4 Backups
o 2.5 CD/DVD Authoring
o 2.6 Compression
o 2.7 Defragmenting
o 2.8 Developer Tools
o 2.9 Emulators
o 2.10 File Sharing
o 2.11 Firewalls/IDSs
o 2.12 FTP
o 2.13 Games
o 2.14 Graphics
o 2.15 Media
o 2.16 Messaging
o 2.17 Office Tools
o 2.18 VPN Clients
o 2.19 Web Browsers and Plug-Ins
o 2.20 Miscellaneous
* 3 Heavy problems, currently incompatible
o 3.1 Academic
o 3.2 AntiSpyware
o 3.3 AntiVirus
o 3.4 Backups
o 3.5 CD/DVD Authoring
o 3.6 Compression
o 3.7 Defragmenting
o 3.8 Developer Tools
o 3.9 Emulators
o 3.10 File Sharing
o 3.11 Firewalls/IDSs
o 3.12 FTP
o 3.13 Games
o 3.14 Graphics
o 3.15 Media
o 3.16 Messaging
o 3.17 Office Tools
o 3.18 VPN Clients
o 3.19 Web Browsers and Plug-Ins
o 3.20 Miscellaneous
