I highly suggest Newsleecher. It just like Newsbin but not a resource hog. Plus it has super search, which indexs the whole groups.
Well, the website did not offer that information. Even if it did not offer the search feature, it sure does look more organized then Newsbin. If it does (I'm inclined to believe you regardless), it negates the need for any other application to search. I'm going to test out the trial here soon to check it all. Good tip.