Hi
I just bought a Sony PRS-505 and it's great. However, I had a large collection of PRC (Mobipocket) books, many in French and also TOR SF books. Calibre has been a Godsend. Calibre was able to change them easily to LRF format. Also this program rocks with HTLM conversion as well.
Many Thanks to the Developper!
Ebookerr
PS: I did send a donation.