Picnic appears to be an interesting tool for small Mac networks where users need to share files. It allows you to "create shared folders of files which are automatically synced between all user's accounts using Bonjour." This could really make it easier for small businesses or workgroups to share files between users (such as was requested by Stephen in a comment to the Ask TUAW post from last week). Since the files are synchronized across multiple computers it essentially gives you a kind of live backup. Mobile users retain a copy of the files when they disconnect from the network and changes are synced back when they reconnect (conflicts are apparently marked). In a lot of ways Picnic looks like the two Mac syncing tool Martian SlingShot, but with support for multiple Macs.
Picnic is now in beta and available for download from Objectpark software.