Hi, Raj,
Bonnie gave you the best ones on the web. GotDotNet in particular is a really good one. I've gotten some good tips from there the last few weeks.
In addition, there are some decent newsgroups on Microsoft's public news server (msnews.microsoft.com).
If you have a news reader (News Rover, Agent, or even the newsreader that comes with Outlook Express), just point to that server and you'll find several newsgroups that begin with 'microsoft.public.dotnet'.
A word of warning that some newsgroups can tend to have some garbage on them. I'm not sure if the MS newsgroups are moderated or not, but I have found them helpful.
Kevin