What sort of authentication websites are out there?

[SgtSpike]

What I mean is, if I want to do a transaction with a given person or company, what sort of assurance can I have that they are legit?

I know one developer mentioned a website that he was working on where a business could become "listed", so you could check on whether the bitcoin address given is associated with the company you believe it is associated with.  What is this website?  And is there anything else like it?

[mewantsbitcoins]

I am not aware of any websites you can check businesses, but you can definitely visit http://bitcoin-otc.com/ web of trust and check individuals.

[PLATO]

Nothing big yet but there's a lot on the horizon - http://agoristradio.com/?cat=4

On that podcast I heard about this in-development global web of trust for businesses etc: http://blackandyellowpages.com/