Yeah the game works fine, as does my internet connection. i have no trouble surfing the web, downloading stuff. I am currently living in an apartment in Rome, so I don't know the service provider as the internet is wireless provided and maintained by the landlord. Everything works, if you want I will be up for a while, if you want to do a test game you an email me and we can set something up.
Hrm... it's possible all non-standard ports are blocked or something to stop people torrenting if it's wireless.
I guess the other things not mentioned are make sure it's trying to connect to your correct network (wireless and/or vpns cause problems with this since the game binds to the wrong adaptor). Goto "Network Connections", then the "Advanced" menu, then the "Advanced Settings" item, then find the network connection you're connected through (probably Wireless Network Connection) and make sure it's moved to the top of the list with the arrow things on the right.
The other thing is to turn off the windows firewall (if you've got it turned on), then try again.