Nyki Blatchley has a great post about adaptations which differ from their sources; the point he makes about "Female character? Love interest, obviously" is pure gold. (His thoughts make a very good counterpoint to the recent piece I linked on the possible utility of anachronism and its place in historicals)
The BookEnds blog has a good look at the new-author issue of "what if they steal my story!!??" by way of a possible plot bunny. (So, my writing readers, you have been warned before you click!)
The History Blog also provides *serious* plot bunny fodder with this post: how did the foetus come to rest beneath the bishop's robes? Impossibly tempting material!