Would you like to sponsor CalDAV and CardDAV server capabilities within Horde? This has been a Horde feature wish for quite some time now. We would have liked to have it for Horde 4.0 already and it looked more feasible to get it with Horde 5.0. But ultimately we had to delay it again as the redesign had the priority.
We decided however that we would like to tackle the DAV topic with top priority right after Horde 5.0 has been released. And we already have some pledges of support to get the feature completed - but we would need a few more to get complete CalDAV and CardDAV support within Horde as the whole thing is a larger story.
Thanks for you support!