Mobipocket has its own format...
I was about to work for them, but they chose somebody else.
If I had worked for them, I would have suggested them to port their reader to the GP32...
so sad.
By the way, how would you sort by percentage the use of the different of ebook formats?
.lit, .prc (mobipocket), and so on?
All I know is that mobipocket's desktop app can write to .lit as far as that goes.
I don't know the percentages, but I do know that mobipocket is used more often because many libraries have e-books avaliable in either drm'ed prc or drm'ed pdf.
There IS a lit to html program somewhere, but I forget where I've seen it.