Don't upgrade to 9.2
The only reason I'm no longer a SusE fan is becasue of 9.2. It was like Windows ME.
The main reasons to upgrade a distro though would be:
- New Window Manager / X system release
- New Kernel version
Most of this can be upgraded through YaST, or by compiling it yourself. And always remember, if your happy with what you have, don't change it.
Oh yeah, I don't think there is a thread that tracks the changes. If it exists, I've never seen it.