I'm curious about why Amazon uses this apparently crappy Topaz format?
I don't have a Kindle, but Topaz ebooks seem to look much crappier on K4PC than the Mobi formatted books.
My limited browsing of the Kindle-related forums seems also to indicate that in general Kindle users also don't like the format - slow reader performance, poor display quality, etc.
And only a small % of Amazon books seem to be in Topaz compared to Kindle Mobi.
But then, I guess our clever software gurus would then have to find another challenge - although at this rate there won't be too many left, thank goodness!