Xbox Live - Blocked. Steam - Blocked. PSN is also blocked too, I believe.
I don't think World of Warcraft is blocked, which is probably good to stop the possible NERDRAGE~!
I've no idea about the other games, but I'm sure you can e-mail the computing section of the Uni and ask.
Internet Speeds are superfast. Downloads of around 500kb/s from Rapidshare is pretty normal.
Torrents are supposed to be unallowed, but I, and anyone I know who has used them, have had no problems with them.
DC++ didn't work for me, but I don't know whether that's my fault or it being blocked.
Parkwood's speeds are as fast as anywhere else on campus, ie. very. I am basing this on my old out in the countryside speeds that I've got back home, so it might even be slower than some people have at home. However, it's good enough for me.
One thing they do slow down (seemingly) is YouTube videos. Often they seem to take an age to load, particularly in the middle of the day.
Internet Internet Internet Internet Internet.