Well, here are my two suggestions to thy site. :D
Replying to Comments
Well, this is self-explanatory really. I hate going into the 'My Updates' section to find a comment that was in no way directed at me. I think the reply button on comments would be rather helpful. I don't know, you are probably going to say it's unnecessary but if a(n) question/answer has a lot of comments I would really like a replying system for the comments.
Also, another suggestion is to actually show your points when answering/asking a question. It would be next to your user name, it would say 'Points: 8590'
Well, I thought they were good suggestions. :3