For all current spell changes...

[Dorakhan]

http://www.narfell.us/modules.php?name=Forums&file=viewtopic&p=325154#325154

Going to work on getting this into the Wiki as well, as that's where it should be.

[Kallethen]

I believe they are already in the wiki:
http://wiki.narfell-nwn.com/Spells:_Modifications

I know I recently added in Mori's Polymorph Self changes to the wiki.