I have an 8800 on the Rogers network, and just wanted to know how much data is being used running the Blackberry Maps with the GPS? Unfortunately, Rogers doesn't have an unlimited data plan and I'm afraid I'm going to get a huge bill at the end of the month due to me playing with the GPS and BB Maps. Does running BB Maps use a lot of data? Is there any way of actually 'guaging' my usage per session? Any feedback would be appreciated.