I need a way to ascertain which individual apps or services are using the most data on my N1. I have found a handy widget called "Data Counter" that tracks Cell & WiFi, Up & Down and there are numerous other utilities which do the same thing. But none of them can tell which or app service is using the data.

Does anyone know of utility that can ascertain which app is using the data? Had a look in the market but nothing seemed to fit the need. I know some will say "get an unlimited data package" but I am not in a position to do so just now.