I installed Snow Leopard from Tiger last night after following the guide that LifeHacker put together.
I have a 2.2gHz Macbook Pro circa 2007.
This is the same guide Wired linked to when they confirmed that a Tiger to Snow Leopard install would work just fine
I backed up my hard drive to an external firewire drive and made a bootable clone using SuperDuper!. (I highly recommend the free version of that software. Very easy to use and the instructions are great, particularly if you're like me and have never made a bootable back up before.) I made sure that Tiger drive would boot up if Snow Leopard cause me harm and went forward with the install.
I have not had a chance to check on which programs work and which ones don't since my newborn decided it was bed time. And when he sleeps, we do
So I'll update with any issues but I checked with snowleopard.wikidot.com
for any that I use regularly before I even bought the disc.
But I can say that my Airport Extreme seems to be ok with the upgrade. It had to restart but after a few minutes, my wireless network was running ok. And since I bought the Family Pack, if all my printer drivers work fine, then I'll do the same thing on my wife's 2gHz Macbook later this week.