yup, it's really nice for KDE users but it's still somewhat buggy for me (crashes on every regular quit). I use it on my main PC because I use KDE on it. My laptop however doesn't have that much power and I run XFCE4 on it (and actually considered to use it on my main comp, but I'll wait for v4.2
I don't like running KDE applications outside of KDE because generally those run slower than the GtK+ counterparts such as Gaim.
As for the current I remain with gaim on XFCE and kopete on KDE. I don't mind missing MSN at the moment.
But I like the fact that the kopete team wants an application that fits to the standard GUI and is not a ressource hungry skinned program.
BTW: The link to http://kopete.kde.org
and will be released together with KDE 3.2