Where can I find information on what ‘Web 2.0’ companies valuations are?

Does anybody know of any source where I can find out what 'real' valuations internet startups are getting?

The term 'real' valuation is totally made up, but I mean what actual investors are paying. So if an investor pays $1 million for a 10% stake in company X, then company X has a 'real' valuation of $10 million.

Thanks.

EDIT: As per Tim's request, this is my intention behind the question. 1) We had somebody offer to do work for N% equity. We felt N was too high, but don't have a clue what to counter offer. And 2) We feel that we should always have some clue how much it's worth so we'll be prepared for future investor and/or buyer opportunities.

I don't think there's a public source of the information you are seeking (because these companies are privately held).

There's information on the amount of funding raised, but not the actual valuations.

Since I don;t have the points necessary to comment I have to ask the question in the answers portion - why do you want this information? Maybe there is another way to get to the result you want without that?