It's quoted early and often in all the news stories. Here's what's purported to be of the memo. Most (if not all) of it has been quoted.
Here's a from the same source.
I suspect that, even as we speak, conservative blogs are attempting to make a case that it's a false document. Sen. Martinez doesn't seem to think so, and I have trouble believing his aide would have resigned if it weren't (1) real and (2) from him.