A new Community Technology Preview was just released for Team System Web Access 2008 SP1. Hakan Eskici has all of the details:
| Team System Web Access (TSWA) 2008 SP1 (CTP)
Work Item Web Access (WIWA) 2008 (CTP)
I just got done installing this release - it was a 5 minute project, very easy! Even though Windows Server 2008 isn't listed in the system requirements as a supported operating system, I went ahead and installed both releases (TSWA + WIWA) on Windows Server 2008 and it's working like a champ. Update: Buck Hodges just posted a comment to indicate that Windows Server 2008 is in fact a supported platform. This will be updated in the docs.
One tip, once you get everything deployed if you want to edit configuration settings just open up the web.config file in the respective \program files\<app>\web folder. Be sure to open the file with elevated permissions (e.g. "Run as Administrator" either Notepad or Visual Studio) or else you'll get a permissions error when you try to save the file. One thing I did was change the default Team Foundation Server to the one I use most often. See the <tfServers> tag.