Is there a tweak that lets you disable 3g access by app?

[unlimitedx]

I only want pandora to be using wifi and stop streaming if the wifi gets cut off. something like the toggle in tunein app would be great.
anything like that?

 

[sch11]

Firewall iP does this, but it's not more like an app than a tweak.

See http://yllier.net/FirewalliP/FiPDepiction.html .