Looks like that Telegraph report is getting lots of attention in the blogosphere and even some attention in the mainstream media. I’m still skeptical, but this is too important a story to let pass without investigating it thoroughly.
UPDATE 12/18: More on this to come, but Michael Isikoff and Mark Hosenball have done some digging and think the memo is probably, as suspected, some sort of forgery. Their evidence isn’t ironclad, particularly since they haven’t seen the document or investigated its provenance, but they cite FBI records showing that Atta’s movements are mostly accounted for in the spring and summer of 2001 – making it unlikely, though not impossible, that he could have slipped off to Baghdad for three days – and they note that the Telegraph reporter simply says he got it from “a ‘senior’ member of the Iraqi Governing Council who insisted it was ‘genuine,'” and the Iraqi National Congress thinks the document is bunk.
Good leg work on this by Isikoff and Hosenball; this story needed to be checked out, and it looks like they scooped everyone else in doing so. Stay tuned to see if there’s anything else to this story.