Looking at the biteSMS for iPhone features, it makes me ask two questions.
1 - Why aren't these sorts of things built into the core of iOS by Apple?
2 - Is this something that I'd jailbreak my phone for?
Obviously #1 is apple's uber-control of things, but #2 is a definite "maybe" from someone who hasn't seen anything in the Jailbreak world that has made me want to void my warranty (so to speak).
Original reddit discussion thread.