There was the time when I used Feedster a LOT. Visited every day, sometimes multiple times a day. Relied on it.
It’s very… green. Mostly green (and, if you’re using Opera, all green with a warning message that you should get a different browser. Pleh.)
The blog announcement goes on at great length about the feedbuzz, and making widgets to go on your blog, &etc. Also mentioned is a tweaked search that is supposed to minimize spaham. I think it needs to be tweaked again; do a search for used cars and you’ll see what I mean. (And if you think that’s too much of a leader, search for Feedster and look at all the discontinued feed notification entries.) Speaking of search, Feedster does have some pretty spiffy operators but doesn’t promote them much. Visit http://feedster.com/help/search.php for a list of what can be done including some very nice site operators. (You can also search for podcasts now on Feedster, which is new from when I was using it.)
I seem to recall that Feedster used to offer an RSS feed for its search results. I don’t see that readily to hand. If I wanted to create a Widget that’s obvious, but if I want to just take an RSS feed and do my own thing with it, that’s a little tougher.
The advanced search options are intriguing but the search seems a bit slow and I’m not interested in playing with Feedster widgets. The number of standalone blog search engines I like remains at two: Bloglines and IceRocket.