CardDAV is the WebDAV plugin to handle vCards from my understanding. If you can sync to google or owncloud, then you're on carddav. Who knows, at some point i might support CalDAV and get my calendar app going... I've got nothing working, so things kind of went on hold as other things popped up in my life. I'm hoping when i have something i know will do what i want, i can spend the time working out how to use it, rather than messing around with a device that I'm not actually sure will do what i need it to do anyway. I still use sms frequently, but I'll use WhatsApp over mms. I wouldn't hold your breath for something from me. I've been failing to complete a lot of my projects for years. In fact, i think Super JumpKick Turbo was the last thing i actually released, and that was some time ago. I have a lot of intentions, but also lots of interruptions, and i generally hate a lot of stuff i make.