I just implemented beta 1 of our new newgroup archiving system. http://www.sqljunkies.com/newsgroups/ - each newsgroup has a link for the archive next to it.
We are not implementing searching capibilities at this time, we may in the future. We're going to let Google and other crawlers take care of the searching, but there is a lot of valuable information there we hope you all we be able to use.
We went back as far as we could for the newsgroup servers we are pulling from at this time, as you'll see they don't archive themselves, which is why we started. A lot of them only go back 3 months or so. We're going to be doing a weekly (maybe daily) pull of posts. Note, the primary newsgroup interface still pulls live posts.
Enjoy