After an all-night stint fixing my machine after I or Apple stuffed up the installation (thank the gods for Time Machine yet again) I have the GM up and running on my main PC.
2.4GHz C2D Alu MacBook with 9400M. Running sweet as a nut. No issues with graphics performance, everything is lightning quick. Did a clean install from a USB drive imaged with the Lion installer then restored from a Time Machine backup that goes back to 10.5
After a long time indexing and caching my Mail the system is now 100% responsive and working a treat.
Mail with over 28k messages is running very nicely indeed - no crashes so far. Hate the old version of Mail now, much prefer the layout of this one and the display of conversations is so much better than before.
Not so sure on Launchpad, it'll probably make good demo but that's about it. The full screen apps are great on the smaller screen, Safari and Mail probably won't transition to a 27" unlike iPhoto/Aperture/Final Cut etc will. But then, you don't buy a 27" iMac to run Mail full-screen do you?
Scrolling is nice and smooth, still getting my head around the reverse direction but they're right, give it a week, it does make more sense.
Two-finger swiping is working again in Safari. If you have your trackpad set to only two-finger scrolling for navigation however it doesn't work in Finder. So set it to "two or three" fingers and it all works very nicely. Two fingers to do the cool page slide thing in Safari, three fingers for an instant swipe forwards or backwards in every app.
Still waiting on updates to iTunes, iWork etc. to support full-screen, 10.5 beta does so it can't be too far off.
I'll see if anything turns up but after half a day of use I haven't bumped into anything yet.