I was suggesting that you might like to do it, Roy
. Most of us who post books these days post them in both Sony Reader and Mobi format. It's really no more work, if you use BD.
The one thing with Mobi is that you don't get automatic page breaks, so you need to make sure there's a manual page break at the start of each chapter. Once you've done that, though, just click the "Palm" button on the toolbar, and use the following settings:
File type: Mobipocket Reader
Device: Sony Clie
Book name: whatever you want the title to be
Clear all the check boxes EXCEPT the "Latin filename" box and, for the final touch, if you have a suitable picture available, drag a cover image onto the "cover file" box (the CyBook shows you your library with the cover images, so this is a nice touch, if a suitable picture is available).
That's it. Just click the "Make Book" button and the Mobi book (with a ".prc" extension) is created. Takes literally a few seconds.