SwissDisk is encrypted webDAV enabled online storage.

With a free account you can sync iPhone iPad calendar.

Droid Galaxy HTC Evo Android Palm Blackberry DroidX backup with a webDAV app such as pader-sync.com - OmniFocus for iPhone Mac OSX

Free BitKinex or GoodSync for PC laptop or Macbook

Find over 120 webdav apps for the iPhone, iPad and iPod at apptism.com - find webdav apps for Droid OS at appbrain.com