Last Saturday, I backed up my personal data, gritted my teeth and initiated the distro upgrade (7.10->8.04) procedure with some sense of dread.
When I got the machine last fall, just before 7.10 was released, I somehow managed to completely blow away my partitions during the upgrade. I have not figure out how that happened to this day. I'm hardly a Linux Newbie, and I have been using and upgrading Ubuntu Variants since 6.06. That was weird.
Anyway, When I got Sunday morning and, much to my surprise, the downloads had completed, and the user prompt was patiently waiting for me. I few interactions while I got dressed, and my computer was upgraded to 8.04 before I left for Church.
I have to say, it's been a really good week with 8.04! My experience with 8.04 has been that it's better, but in those subtle ways that don't change the experience except in the ways that make it more mundane to use (k)Ubuntu.... you just use it, things are even more stable than you've become accustomed to, and things work.