I've updated my late loan stats chart, adding the 12/15/07 data points.

This chart, along with discussion, appears as a new entry today in my blog
http://prospers.org/blogs/Fred93 I included as an example a calculation of default rate for Prosper's Oct'06 loans (about 20%/year), and comparison of same to the default rate mentioned in a recent Yahoo article about Prosper (3%).
I used to post these charts every 2 weeks on the prosper.com forum. Prosper has disallowed that a few weeks ago (apparently now disallowing all graphics in messages), so I switched to posting the charts in my blog. Now that we have a public section in the prospers.org forum, this might be a better place.