Dotfred has PPCContactsMgr:
PPCContactsMgr is a plugin for the Outlook contacts application. It allows to select multiple contacts at once for deletion. It allows also to add phone numbers from calls history and received SMS, to beam several contacts at once via IR or bluetooth and to add several contacts at once to SIM.
Here's the link:
http://forum.xda-developers.com/show...PPCContactsMgr
This is the only thing I could find regarding deleting all calendar entries:
http://forum.xda-developers.com/showthread.php?t=268403