Haha. Hope the dev team would do something about the qt im stuff.
So far I've found jpilot, a clone of palm desktop in Linux, one of the best candidates. It is pretty fast and GTK2 based. You don't need a palm os device to use it (though I'm planning to use my Abacus Wrist PDA with it). It's also an all-in-one PIM suite, with datebook, address, todo, memo, expense (for simple finance) and keyring (for encrypted material). The data can be exported too .txt, .ical, .csv, etc. The only drawback in the GTK2 compiled version is the window and widget sizes. Some of the screens persist in opening wider than than 640x480, even if they're maximized. (Maybe someone can recomplied it with nicer setup. But I am not able to figure it out) And also jpilot doesn't have as many eye candies as found in the KDEpim thing. Otherwise it's a good app. I've heard many people just use palm desktop without palm devices and use it as the main PIM program on PCs.