I've been Bonanzling for about a month now and just made my first sale (a Trigonometry book). The sale was to a new user who just joined Bonanzle, so no doubt the person was looking for this particular book and the Google key words brought the buyer to my booth. That's a great feature that Bonanzle has -- you can automatically "search optimize" with google attributes using Bonanzle's batch edit and the item gets in a google search engine. I find using the ISBN very effective.
Also, apparantely Bonanzle is really growing. This website shows the statistics and traffic of the top e-commerce websites (obviously eBay's #1). But Bonanzle is already at #4, quickly surpassing more than 15 other sites. EBay has more than 26 million listings and the second most popular site, eBid, has only 2.4 million (Bonanzle has 1.6 million). Obviously these other venues have a long way to go before they really give eBay a run for their money. In the meantime, I'll just keep tooting Bonanzle's horn every chance I get. It's such a fun place to be on!
