I downloaded grokker2 based on some semi-favorable buzz that I've seen on the web. The idea behind grokker is a spatial visualization of data as supplied by various plug-ins (currently supported are Amazon, Web Searches, and the local file system.) The interface is not short of eye-candy, but I'm disappointed to report that (IMHO) it is short on utility. I figured I'd test it by searching for things I know about... Alfa Romeos and all things Denovich. I couldn't find the particular pages I was looking for even when I continued to filter the results. Results that are the #1 link on google weren't even in the results in Grokker. YMMV, but I doubt it.