WePay’s (YC S09) Group Payments Get Some Big-Name Backers, Including Max Levchin
techcrunch.com
techcrunch.com
Me and my roommates use it and it has suited our needs fine for years
All it really does is expense tracking - you can post bills, and find out who owes who how much. There are also some semi-vanity features like stats on where the group is spending its money.
I think billshare is good enough when you know the people in the group and can trust them to repay you when necessary. Otherwise WePay is probably the way to go.
For my needs, this is the best tool out there.
http://www.flickr.com/photos/toivotuo/2857596922/ (scred.com)
http://img17.yfrog.com/i/f2w.jpg/ (wepay.com)