I've tried, but so far, I haven't gotten it to work. Kovid's Calibre epub newspapers look PERFECT on my Sony, but my BeBook seems to be having problems with them. Basically they seem be blank and only two pages when I try opening them on my BeBook.
Some old epub files that I made from an earlier version of Calibre (sorry, not sure what version) open up, but they don't have any photos, so not sure if photos are the cause of the failure or the cause of the success.
I'll keep trying though...