calDAV and cardDAV are open standards for access to calendar & contacts, and IBM is all about open standards!
We already have support for iCal, vCard, and webDAV in Domino... please stitch them together to provide calDAV & cardDAV support.
Just like most organizations we started with Blackberry devices on BES servers. These servers have tables for both user and device information. When IBM came out with Traveler it was my understanding that it was supposed to be comprable to the BES servers with the exception of supporting Andoid devices.
Using the Notes Traveler Application, it can be possibile to sync data (and front-end) of all Notes/Domino Application.
So Traveler became a Mobile Lotus Notes that can can be develo by IBM and third-party with many application like iPhone just do It.