As mentioned before p@rdus currently sponsors development of draft mobile mail and mobile calendar portals for Android, iPad and iPhone. These portals are based on Horde4 and the recently released jQuery mobile framework.
The Horde developers have been far quicker than they promised themselves and so without further ado here are some early screenshots of the projects:
Now p@rdus still needs to ensure that these screens go live on a Kolab server near you. Packaging is progressing well and chances are high that you can try the alpha version very soon.