Gonna have two users as NPCs in my FR campaign. They're involved in making a poison that can't be neutralized (nor can lost ability points be restored) by normal magical means. There will be a confrontation with them in a dead magic region -- where they will be able to sling spells and the PCs won't be. Oh, how sweet that will be!
I can't wait to start delving into the shadow weave with my new character. I think that it is a great addition to the game. I have another post about two books return of the archmages and the seige. Have you read them? Any ideas?