I'll format everything and start with a clean slate I think. I have weird bugs where my screen dims (that's normal) but then comes back randomly to full brightness. Also I think it's slower than it used to be. I'm afraid to carry over some rubbish from my current system, so I'll just format, install Lion and then drag everything back one by one, reinstall my apps, my iCal stuff, etc... It's going to suck but hey... Worth it!