Got myself a neoprene case for my Mini today from Amazon since nothing appears to be available anywhere...It's not really a Mini case, it's a 5" gps case with almost exactly the same measurements as the Mini. It comes with a little mini-stylus which I wouldn't likely use with it as there is no audio on the Mini (therefore no place to plug it in) but I can use it with my smartphone.
This is what I got:
http://ecx.images-amazon.com/images/I/41dF7dO4O3L.jpg for $4.99.
I'll post back when I get it to comment on the fit etc.