An over the counter market for Bitcoins, with an open order book, and a web of trust based on GPG keys.
Link: bitcoin-otc.com
still owes me money, but has been in touch and we'll work something out. Note that I never thought he was dishonest, just irresponsible :) Will update this rating as the story develops
#bitcoin-otc is merely an aggregator of outstanding supply and demand. All transactions that may occur are conducted directly between counterparties, without any participation or intermediation from #bitcoin-otc. As such, it is each individual's responsibility to conduct due diligence...