> Launch any app from the keyboard in Snow Leopard

Never have looked too kindly on increasing my third-party background app load (a very risky category), just to get more keyboard shortcuts in OS X. So, I'm very much looking forward to assigning keyboard shortcuts to launch apps, natively in 10.6 (via macosxhints.com); at least, whenever I eventually, cautiously, pull the trigger and actually switch to Snow Leopard!

Which is something I definitely recommend you avoid, until at least the third 'point update'. Rather than jump into bed immediately with all four big Apple cats (Jaguar, Panther, Tiger, and Leopard), I hung back, watched and waited, until versions 10.2.3, 10.3.4, 10.4.4, and 10.5.3, respectively, to finally do the deeds.

You can ascribe my caution to the ridiculous-but-undeniable fact that it takes this planet at least three attempts to get any new computer engineering to work in such a manner that nobody will need to pay a huge upgrade tax in the time and energy spent identifying mysterious new bugs.

Refusal to participate directly in the bleeding edge treadmill is definitely the way to go. If you have trouble letting go of the immediacy of it all, repeat after me:

"An operating system is a serious piece of engineering. Not a fashion accessory. An operating system is a serious piece of engineering. Not a fash—"

etc.