Holger Kleinsorgen just posted a link on the IRC channel for an app he's been working on he calls Storelight. It connects to a store database and lets you do Searchlight like searching of it.

http://www.smallish.org:7777/seaside/Storelight

This app uses async ajax calls to do the searching in the background and update the page. Seaside is spreading like wildfire, take a look at it and give Seaside a try yourself!