Real custom content for Sims 3 - huzzah!
I only learnt about this today too: the BRILLIANT news that we will be able to create custom meshes for Sims 3. It came just in the nick of time; I had given up on Sims (done everything I wanted in Sims 2, and no chance of doing anything similar in Sims 3 - sort of spelt 'game over' for me). But this is great, great news and I'm suddenly looking forward to Sims 3 rather than giving a bored yawn.
I know precious little about the details yet. Meshing is just one aspect; I also want the flexibility to create my own textures as well - it's no good creating nasty old oil drums and then see them appear in 'pink fuschia' cotton print fabric in the game! But, if the world will steer towards the ideal, Sims 3 in the Cyclonesue corner will be business as usual, or perhaps we should say vileness as usual.
Can't wait!