Ok, so far youve noticed:

1) Watched topics list.
This enables you to see what topics you are watching and unsubscribe if required.

2) Who has replied.
If you click on the number of replies a post has, it shows who has replied and some other stats.

3) In your profile:
Turn siggies off

4) In your profile:
Turn avatars off.

5) In your profile:
Turn smileys off.

6 and 7 are unlikely to be found by you lot
We havent touched the homepage to my knowledge