I ordered my copy of Snow Leopard earlier this week and was pleased to receive it on day of release at about 7.3oam this morning!
I am intending to install it on a different external drive to the one I currently run Leopard 10.5 on as a fresh install and then install my applications as and when required.
I prefer to do it this way as I don’t have to worry about crowding the drive with unused applications or filling the memory with “helper” applications for apps I don’t run.
Of course the main downside is that none of my preferences are there, so I have to “add” them all back in again.