The EU Think tank JRC (Joined Research Center) has published a document on biofuel and the impact it has on food/fuel price, the Carbon offset that may or may not be present. depending on how the bio fuel is grown and made. It also as some recommendations on the use of biomass instead of Oil for heating etc.
There are some interesting things said in this document, it touches on a lot of area including security of supply etc.
The EU as a good energy site, its a bit overloaded with information energy.eu the link for the document is here