I would say nanotube. Nanotube held the funds for Trendon Shavers' bet with Vandroiy regarding ponzi payments, and has the freenode channel #bitcoin-court where several voluntary resolutions have been worked out.
This. I'm working to beat him though - largest amount in one go so far was only 2200BTC. 
Ah, you hadn't mentioned that you were looking for escrow providers. If you had ust said so in the beginning, you'd probably have gotten more useful answers. Have you seen this Escrow List thread yet?
https://bitcointalksearch.org/topic/escrow-list-108716
https://bitcointalksearch.org/topic/escrow-list-108716
ooh thanks. John the dong is a moderator here on the forms, someone like that would probably work quite nicely.
PS: I've changed the johnthedong pseudonym as it sounds wrong.
well how would you like steady work then john? trustworthiness aside (of which im sure you have plenty) you have name recognition, that is very valuable to me. also w/e i can write dong on my website if i want to, grandma can just get over it. check out radicalmoney.com, It belongs to me and your services may be invaluable in this endeavor. Anyway if this sounds interesting to you pm me so we can talk about specifics.
A side note: Can I pl0x buy some $50 Gold Buffaloes from you at your site??
ya work in progress =)
