Ok, for this version I have decided to raise the minimum version number of the app from Android 2.1.x to Android 2.2.x. This will cut off about 1500 users (3.34% of active users), but I think the increased information is worth it.
After working out a few ideas I came up with a pretty nice looking chart. It shows traffic, in bytes, for transmit and receive data where transmitted data is represented by a bar graph above zero, and received bytes are a bar graph below zero.
There is also a new traffic group in the Main window showing Mobile and Total transmit and receive bytes. I haven't figured out what "Total" actually means yet, but as soon as I do I'll put that info to use.
Now for more testing!