I have a Motorola Milestone (Canadian Droid). Since updating to 2.2 a month ago (and potentially installing some apps as well), my data usage has increased immensely. I went from ~3meg a day to ~30. Today I've only done text messaging on my phone and it's used 8meg.
Clearly a background app (or system?) is using up all my bandwidth. How can I tell what is the culprit?