Is there a locale-like app for situations with a low signal?

[chennyboy2002]

I have a Sprint HTC Hero. And in cases where there is low signal, the battery drains really quickly. I think this is a CDMA issue because the Hero is set to always-on-mobile and is constantly accessing the network.

Is there a app like Locale that would automatically turn off always on mobile or mobile data altogether where there is low signal?