Hello
What I noticed with mine (2.0 final), if the bittorrent set to Enabled, the fan will run continuously (not on high, but still, it will never turn off) - even with nothing to download.
What I do to let it 'cool down' is I Disable the p2p in the Applications -> P2P -> Settings screen. Disable entirely, not by using the hourly scheduler
After a few minutes fan will stop.
Hope it works for you too