Loved the W/T interaction. Most everything's been mentioned, so I won't repeat. There were some specific things that Tara did that I really enjoyed and I haven't seen them mentioned, so here goes...
While the camera was on Anya, when Tara was buttoning her into her dress, there were a number of times that you could see Tara's head shift so she was looking at Willow. She was obviously having such a hard time focusing on Anya.
Loved her rolled eyes and raised eyebrows when Anya is talking (about wanting to see Xander and then seeing him without the dress on) and she and Willow are reflected in the mirror. She was adding such fun punctuation to what was being said. I also thought that it looked almost like Willow and Tara were brushing shoulders at times in that scene.
I laughed at loud at the cut away shot to Tara when Buffy started making up the excuse about the minister having to do a C-Section. It was so clear that she was astounded at how blatantly obvious it was that Buffy was making something up off the top of her head. But she backed Buffy up anyway, even though she didn't actually know why Buffy was stalling.
I also thought it was funny when Tara was chasing Anya down the hall, and when Anya stopped, Tara sort of had to shift and go by her on the side since she couldn't seem to stop immediately. She practically skidded to a stop. Guess Tara just isn't all that used to running around in heels.
So there were some Tara gems that I hadn't seen mentioned that I though merited a shout out. Just didn't want to rehash what everyone else has said.