Doesn't Diet Rite now have Splenda? I'm not so sure what to think of Splenda, mind you...but is another option. There's still that "cephalic phase response" though.

I've never had any problems with aspertame persay, but I have noticed a subtle urge to eat something else on occasion (after drinking diet pop).

P.S. Yes, I said POP, and yes, I hail from the midwest originally.