This sounds like an idea I wish I had thought of! What a great one, too. I haven't tried it yet, but apparently the idea is that you run Spotlight on Macs you'd like searchable across the network, and Searchlight provides a web interface to Spotlight searching on that system. It also lets you subscribe, through RSS, to particular files, do saved searches, etc. At only $30, this is a winner if it works as advertised!
Update 8/18/12. It took me awhile, but I finally found Searchlight on another site (something called CASEapps.com). It appears to be abandonware, now presented as freeware. No mention of a price or registration on the website or the downloaded disk image. That being the case, I'm saving myself some time by deciding to leave this one where I found it.
