I'm not planning on it, but sometimes I fear it's inevitable, what with the way I abuse Tums.

Have you tried H2 blockers (Pepcid/Zantac/Tagamet) or proton pump inhibitors (Prilosec/Prevacid)? I used to go through heroic amounts of Tums myself, but Prilosec seems to keep things under pretty good control. (Admittedly, I worry some about the long term effects, but FWIW my doctor seems to be in favor of it so far.)