What do you want for your iPhone/IPOD Touch?

What kind of applications do users want for their new IPhone or IPod Touch? We know that Apple's SDK has some restrictions on what a programmer can or cannot access. For example, a Profile Manager to handle Ringtones, Volume controls etc is out of the question for now - unless you use a jail-broken iPhone/iPod touch.

So are you a proud owner of one of such devices? What kind of killer Apps do you want for your device? Please comment, as I am planning to assemble a small team to produce the application you want! Come share with us what you want.