ifolder looks interesting - I started reading the documentation today. I've been working with Groove the past couple years, part of which has a similar functionality, but ifolder is cross-platform and open source.
Although it might be useful sometimes to have ifolder on a server, and be able to make an ibay also be an ifolder, it doesn't look like it's actually necessary. A group of clients would do fine, especially if one of the clients is a desktop that can be left booted and connected.
I'm interested, and will keep reading as I find time. Looks like Novell's commercial version has Linux install instructions at the console, and configurability through a web site. If the open source version does the same...
If anyone runs into docs describing the synch function, effect of simultaneous edits, etc., I'd really appreciate it if you post a link here.