First, I want to say that Ksmoothdock is awesome! I started using a MacBook Pro a year ago when I started a new job, and it really showed me that even the KDE is better than Windows in most ways, we've still got a long way to go before we catch Mac. During that year, I've tried to make my KDE environment as Mac-like as possible, and ksmoothdock certainly helps with that (running it on Kubuntu Gutsy).
It would be really cool if ksmoothdock could group applications together in the way the OS X dock does (Kicker's taskbar does it too, although the dock is better).
Adding kicker applets to ksmoothdock would be really great, too :)
Jonathan in San Bruno, CA