[uglytom]

I agree. Even with my short time I have spent on HN, I find the place to be much more civil and information with less clutter than Reddit. Keep HN's identity strong and don't try to "copy" Reddit. I would think that if you allow a few AMAs it will quickly devolve as everyone would want to do an AMA.

[JoshTriplett]

AMAs still have to get upvoted and have questions posted. If J. Random Whoareyouagain posts an AMA, it'll either die in "new" with 2 points, or fall off the front page with 10 points and two comments.