First let me wish you all happy new year :-)
2008 is certainly going to be an interesting year for KDE with the next major version finally being released and the focus shifting from refactoring to polishing and using the new APIs. I can't wait to see what people will come up with by the time KDE 4.1 or even 4.2 gets out.
KWin's compositing has seen many improvements in the last months, but we're still not completely sure if we want to enable it by default (even only for the selected cards and drivers). If we enable compositing and it unexpectedly fails for someone then there's the chance of him/her not getting a usable desktop at all and we're not sure if we want to risk with that...
Should we disable it for everyone by default (it's not difficult to enable anyway) and wait until we implement some safeguards for 4.1? Or should we enable it because it works for most people for whom it's enabled by default and end-users are less likely to adopt 4.0 anyway? What do you think?
I've also got a few more interesting things coming up, but I'll keep those for the next time ;-)