Along the same vein as my last entry. I ran across A9.com this morning. It's pretty spiffy. I really like what they've done in terms of interface, all the way down to the URLs created from searching. This is especially handy since most of my searches are generated by url generation. It much simpler than reverse-engineering someone's form contents. Definitely an idea worth applying to other things I'm working on.
For those of you who swear by Google, you can rest easy because the web and image searches are both powered by Google.
I haven't had a chance to fully digest it yet, but I hope there will be more sources of information we can add or customize.