Expanding vaguely on previous threats, AT&T's head says that the firm will offer "incentives" to have heavy users reduce their usage. Incentives is 1984-speak for penalties. follow link
Extract Directly from Time Machine
Normally you use Time Machine to restore lost data in a file like this: within the Time Machine interface, you go back to the time the file was not yet messed up, and you restore it to replace the file you have now.
You can also elect to keep both, but the restored file takes the name and place of the current one. So, if you have made changes since the backup took place that you would like to keep, they are lost, or you have to mess around a bit to merge changes, rename files, and trash the unwanted one.
As an alternative, you can browse the Time Machine backup volume directly in the Finder like any normal disk, navigate through the chronological backup hierarchy, and find the file which contains the lost content.
Once you've found it, you can open it and the current version of the file side-by-side, and copy information from Time Machine's version of the file into the current one, without losing any content you put in it since the backup was made.
- ExtraBITS for 14 December 2009 (14 Dec 09)
AT&T Plans To Curtail Heavy iPhone Data Users
I barely use any minutes on my iPhone's plan - I have nearly 3500 rollover minutes stored up in a year of owning an iPhone, and yet I don't see AT&T offering me any "incentives" for being so nice as to not overload their network.