im using my 3g to listen to pandora non stop. it is on prolly 15hrs a day. plus im tethering it to download songs, torrents, and watch movies. ive went to tons of flash web sites and nothing. ive been tethering ever sense the 3g first came out too. im using over 5gb a month, sometimes almost 10gb.
in my opinion, you are safe. you got a unlimited data plain for a reason, use it. they arent going to look and see you usually use 500mb and then suddenly youre using 1gb and flag you.
for those that are new to jailbroken phones and web apps, theirs torrent downloaders for te iphone, flash players if you go to special websites, a thing called seeq pod, mobilecast, qik, and the list goes on.
if you get flagged you can just tell them you have a jailbroken phone. they cant do much past that
