Well the BOINC Default client is about to get a face lift. David and I have been working with the guys at World Community Grid to come up with a simplier GUI than the one in use today.
The simple GUI will be skinable. We will be releasing a specification for how to construct skins at a later date.
It is our hope that skins can be used by both projects and teams to present a better experience for everybody.
What we have nailed down so far is that the skin file will be XML, and it'll contain references to BMPs, JPGs, PNGs, and GIFs. The skin file will be stored in a subdirectory called 'skins'.
Here is an example of what a skined BOINC Manager looks like: