just a few thoughts...
1) how much of what he saw, was the handiwork of the DustThing, and how much was his own mind?
2) raise your hand if you thought somebody should've been gathering the sand around the 'gate, just in case.
3) um, sticking a body part through a stargate that's about to close....isn't that how they killed Kawalski?
4) Young had a good idea, telling O'Neill that they should let the shipboard folks send messages home...but how?
...if they use the Stones to record messages on Earth, then the shipboard folks' loved ones will neither see their friend or familiy member, nor even hear them: they'd hear the voice of whomever it is Earthside, but with their friend or family member's speech patterns.
5) damn you, Rush - you told Greer to shoot...now you're tattling that Greer shot a guy?
6) clearly, Stargate's idea of "edgy" is to put sung songs on the end of episodes - just like The Sarah Connor Chronicles. ;)