We had an interesting use of tower shields performed by a PC a while back.
He had a sorcerer who picked up the still spell feat and a tower shield. He then used the tower shield in combat and cast behind it (he usually tried for area spells so the cover wouldn't matter) using all his spells stilled. The drawback is obviously the fact that he doesn't use his highest level spells that often, but it actually worked pretty well. He would be a wrecking crew since foes basically had to land area effects or else close on him (usually giving plenty AoO's) in order to deal with him effectively. Also the idea of a little sorcerer poking his head from behind a giant portable wall to launch a spell is somewhat humorous.
He had a sorcerer who picked up the still spell feat and a tower shield. He then used the tower shield in combat and cast behind it (he usually tried for area spells so the cover wouldn't matter) using all his spells stilled. The drawback is obviously the fact that he doesn't use his highest level spells that often, but it actually worked pretty well. He would be a wrecking crew since foes basically had to land area effects or else close on him (usually giving plenty AoO's) in order to deal with him effectively. Also the idea of a little sorcerer poking his head from behind a giant portable wall to launch a spell is somewhat humorous.