That's odd, I wonder what was using those two .dll files if the service was stopped. It also seems strange that uninstalling did not resolve the problem. I installed the beta 4 or 5 times and I installed the RC twice, and the official release twice and did not run into this issue. Granted I've only got two sites and only one is running 2008, but I did not run into the same problems you are having. In fact, I only came across one issue related to the install and it was minor.
I do wish I could get away without the web access, but I'm the only qualified DBA in the company and the typical response I get when I bring up SQL is "what movie are you talking about?" So if I don't want to be the ONLY one reviewing/analyzing/trending/troubleshooting log files, I have to make it easy for others to access them and that's where I use the web access.
EDIT: You should consider signing up to beta next time. With the number of installs you have, it might be worth your time to help ensure problems like these are resolved. And you know what they say... If you're not part of the solution, you're part of the precipitate...
Message was edited by: Acy Forsythe