I dont wait. Waiting for 2011 iMac already long and painfull..
I can get Lion anytime, maybe even next year to make sure things not messed up with new OS
I love Lion´s idea about gestures and being looks and works like iOS, but wait just for the OS .. no no no ... enough waiting
Buying now means you´ll have 2 OS, Snow Leopard and new Lion you purchase later
Buying later means you stuck only with Lion as Restore Disk