Tokyopop has a 7-volume out of Demon Diary.  It's 
actually a Korean manga that takes place in one 
of those customary hybrid medieval/fantasy worlds 
with people and demons (yes,who are bishy as all 
get out - ).  This one concerns the reincarnation 
of the most violent, strongest demon lord, 
Raenef, who must be found and raised to be a new 
demon lord.  Only what they find is an adorable 
blond boy who's a bit scatterbrained and with a 
heart of gold and who is an embarrasment to all! 
Worth checking out!