SyncJe for iPhone wirelessly synchronizes your iPhone Calendar, Contacts, and Notes with SyncML servers.

This is commercial software, but you can obtain a free license till 8th January 2008.

What will SyncJe do for me?
– Keep your information in sync between your iPhone and your desktop.
– Keep an up to date backup of your information in case your iPhone is lost.

http://www.nexthaus.com/syncForm/syncForm.php