Me too. 2011 MBP 13" and I'm not sure I've ever even heard the fan run before. But the A/C is running, the room is cool, and I can still hear the fan. I've been watching the activity monitor, and nothing seems to be revving the CPU much. Safari occasionally jumps the percentage but never that much, and only for a couple seconds. The fan just runs.
And I've noticed a sharp decrease in battery life since installing Lion. Sucking it down WAY faster now. I brought it to a full charge night before last. When I opened the lid next morning it was at 94%. That never happened before Lion. And this morning it lost another 8%, going from 73% to 65%. Prior to Lion I never had a fan or battery issue. I always quit Safari when I'm not using it.
I hope this is something Apple fixes, and soon!