What is the absolute best (and by best I mean cheap) cellphone plan without going prepaid?

My mom owns a cellphone, and she has Cingular.

I really just want a cellphone to text on but apparently you cant get a cellphone and just have a plan where you text, you have to own minutes

SO! What is the best TEXTING PLAN, and PHONE PLAN!
I’ll rareyl use the minutes, but I’ll destory my kpad from texting way too much. Whats the best way to not burn a whole in my pocket without giving up texting