Two-finger scrolling works great, but I've never had any success configuring three-finger gestures under X11 (on this laptop or any other). I used to be an aggressive user of those same gestures when I used OSX, but frankly around the Lion timeframe they started getting in my way more often than not.
Yeah, I'm still holding out on snow leopard. I don't really have a replacement option that I'd be completely comfortable with yet, although the linux ultrabooks seem to be getting pretty close these days.
