I've recently bought an HTC Desire and I'm wondering how much traffic some apps generate. I actually want to know two things: how much traffic (estimation, of course) is generated when syncing with gmail/facebook/weather, and how much traffic is generated when I'm online on Skype and when I talk over Skype.
Edit: to clarify, I'm thinking if I should leave some syncing and if I should talk over Skype over 3G, since I have only 1GB per month of traffic.