reputation aggrigator, where art thou?

I just spotted a draft in my list of posts from about a year ago that I forgot to publish. Here is the piece that was semi-finished:

MOCHI meeting was this evening. I walked away with many ideas – amongst them a curiosity of how a reputation aggregator would work. Something that pulled into one place all online indications of my past participation and reputableness. These would include my eBay stats, Amazon reviewer ranking (if I had one), Slashdot karma points, the number of songs I’d listened to on, the keywords and # of posts I’d made on, the number of hours I’ve been running SETI@home… anything that was evidence of how I participate in a group and I am judged.

so, does anyone know of such a thing?