Check out the Web Enhancement for Complete Divine provided by WotC on:
http://www.wizards.com/dnd/

There are prestige classes that could be easilly included in BR, since they are free to download and thus no problem with us saying: "This prestige class is just fine for BR; go check it out!"

I am very glad these are free for download! Check the Dweomerkeeper (Ruornil), Nightcloak (Cold Rider, or whoever), not sure if the rest are appropriate...