sudden - 9:22 am on Jul 18, 2003 (gmt 0)
We are using a standalone software, which in the long term is way cheaper than any of the online service. It´s called BidRank and works fine for us. But this only makes sense if you have a flat fee dsl connection (or better).
Stickymail me for the url - but i´m sure you can find it yourself. :)