For some reason, my MBP (running Lion) burns data like crazy. For example, I went from .4GB to 4GB in little over 8 hours with no use but checking emails and web surfing. No streaming video, no downloads, etc. I am not sure what is casuing that use - maybe a background app? Any suggestions would be appreciated. Running Lion with VZW 4G modem. It did this with 2 different modems so I don't think it's a modem issue.