I have an OCZ Vertex 2 SSD and I have not had any problems. In fact, I have two of them in my 13" MBP running raid. I either shutdown my laptop or just close the lid and either way I have no problems.
That part makes sense for any SSD.. It's overhead that's not needed. Since it's designed to park the heads on a HDD in the event of sudden motion and SSD's obviously have no heads.