well with all this talk about calibre, I decided to give it another try.
I was too dumb to figure it out the first time around

So now I actually realize, this is on the verge of becoming an iTunes-style organizational tool for my books.
But, I can only select LRF or ePUB output in the Mac version.
Since I still read with mobipocket on my p1i, I'd tend to support PRC/mobi.
But if Mobipocket is going to keep resisting us Mac users, then I'll change my allegiance to eReader