Normally I never do this, but looking at 10.6 previews and reading that, for the most part, it's a "service pack" I'm tempted to just do an upgrade this time around (rather than wipe my drive). The reason? Maybe I'm just getting old, but I don't feel I have the time to wipe, install 10.6, reinstall my OS, redo my Bootcamp partitions (on 2 machines), etc. I wouldn't wipe for a service pack on my Windows machines anyway. What are people's thoughts on this? Are you just going to upgrade or are you going to wipe your 10.5 off first? Also, what kind of experiences have people had doing this (I know upgrading versions on Windows can be a nightmare with all the cruft left over).