Gladiator Girl is on the Kindle! By the way, if anyone is concerned about my cut of Amazon sales, I get a larger royalty from the Kindle sales.
Amazon has some nice tools for prepping Kindle versions of manuscripts, actually it's a .mobi version. Combined with the new Scrivener 2.0 that integrates the KindleGen command line application into it's manuscript compiling interface, it was a tweak-it-until-it's-perfect (but it never is!) dream to set up.
The Nook, not so much. I'm still working on that one.