So after a few days of using Lion on an older, white MacBook I’ve realized that the multi-touch trackpads are probably core to getting the most out of Lion. Even though I don’t have access to a machine with a trackpad and Lion (foo on slow upgrade processes at work) I’m sure there are some gestures you just can’t make on the old trackpads.
Of course that’s a big nudge to upgrade to more recent models. Rumored 15” MacBook Airish machines would make a nice Christmas self-present.