ISPConfig made progress for a long time now for under the hood stuff but not on the gui side. I suggest a modern pleasant gui interface, maybe by using jqwidgets http://www.jqwidgets.com gui toolkit or whatever. Here is an example of a modern gui interface for a control panel : http://www.interworx.com/features/screenshots/. Confort and good looking is not a gadget, it also influences popularity, reputation, is sex appeal at every levels, including for making sell of addons easier ...
We are working already on a new theme, it will be released as part of the next major version (3.0.6).
This is good news, can't wait for a new fresh sleek design. Maybe the mobile design could follow the new overhauled good looking for an ergonomy in adequation from one device to another
3.06 is no more on the roadmap http://bugtracker.ispconfig.org/index.php?do=roadmap&project=3 Is it planned for 3.1 ?
Yes. Please follow this post by till: http://www.howtoforge.com/forums/showpost.php?p=313661&postcount=5