I've been messing with kpilot and the kdepim (which only appears inthe KDE4 menus as kontact) most of the night.
Korganizer (the calendar part) seems buggy, but useable. I have not yet played with getting the memos and notes to sync.
1) quit all background daemons (korganizer and kmail have one)
2) launch kpilot
3) disable everything except calendar, contacts and to-dos
4) sync
note: kwallet and some gmail/gcalendar sync tools crashed me....but once I gave kwallet the passwords it needed, the 2nd sync worked.
5) close kpilot (you may want to check with system monitor or top)
6) launch kontact and *WAIT* for all activity to stop before clicking anything. Korganizer seems especially prone to crashes while fetching mail and redrawing its calendar at the same time.
** GOTCHAS RE: DEFAULT CALENDARS **
1) KDE's default calendar seems to replicate events every time it's synced.
2) syncing w/o any calendar set as default only works from PC->to->PDA
the fix is simple, but non-intuitive.
3) create your own calendar(s) (I've got Mine, Hers, Church, and Quintet)
4) set one of your new calendars as default (so things will sync to PDA)
5) delete KDE's default calendar so your events won't replicate.