I have used MobiNuke for many years... and while it does save some time as a Shot Gun approach to performing a quick ready to go mobile approach of your DNN site, as of today's technology and advancement in Responsive HTML5 Templetizing, you are better off designing a well rounded Responsive HTML5 type of Skin. And if you do not have time for that, its very easy to purchase a fully Responsive HTML5 skin, Re-brand it and possibly study it's responsive grid system. Thats how i learn along with attending seminars about the advancement of Responsive HTML5, Bootstrap technology.
DNN Core itself has also made GREAT STRIDES in accommodating Mobile built in features today... something that did not exist 2 years ago.
I might also point out that interestingly, DNN Store no longer carries the product
http://store.dnnsoftware.com/ as its been discontinued on their site...
Anyway, I know this is an old post but could not help sharing.