It would be pretty simple to make a copy of the DNN site skin. Just read the documentation on how to make custom skins its in the sticky on this forum. Basic design of the skin is a table based layout with the Search token in the upperleft then the solpartmenu for the dropdown menu, then a logo token and finished off with the buttons which is just a divided table holding images that link to the different pages, which have a hover image set to match / "fill" in the button. Its pretty basic actually.

One thing you will quickly learn with skinning is the more impressive the skin the more simple it really is. You could just about create the whole DNN site skin with about 7 lines of html/ascx code, and some CSS. 

As far as I know they don't have the skin listed anywhere for download. *cough* great idea *cough* but I think its cause they want to keep an "original" feel to the DNN site.

Not sure if they would mind or not but I / someone could probably make a copy of the skin and post it somewhere. Just not sure how they would feel about it.