Precipitate lets you search for and launch your data stored in Google services from Spotlight or Google Desktop for Mac. It currently supports the following services:

• Google Bookmarks
• Google Docs
• Picasa Web Albums

Precipitate works by creating files on your machine that are imported by Spotlight, then periodically checking in with the server and updating the local files to reflect any changes. Note that changes may take up to an hour to be visible in local searches.