I will pick it up ASAP, like tomorrow or early next week, because there is an Apple reseller like 200 meters from home, and I will be moving next week to another country where the nearest Apple reseller is about 10km from where I will be staying.
But I shall wait until 10.6.1 or 10.6.2 to actually upgrade my MacBook. And when I upgrade, it will be a fresh install and copy the backed up data from Time Machine.