Gaming - I wouldn't even bother. The average latency is about 300-400 ms and spikes much higher.
Games do work, I know of people using vodafone mobile broadband to play WoW. What it wont work for is fast paced FPS games. Stuff that's not as fast paced like online poker, RTSs, scrabble whatever will be fine.
Cell Networks use satellite also, thanks for that info.
Cell Networks use satellite also
To my knowledge they do, but only for some international links. The UK Cellular networks certainly don't internally or to europe.