TPG hasn't yet put details of the plan on its own site, but announced the basic features on the TPG forum at Whirlpool: 1TB a month as well as phone line rental and unlimited local calls. The plans are due to be available from September 1.
While the inclusions in this deal are broader than the iiNet and iPrimus options, it's said to only be available in "limited TPG coverage areas", which might limit its appeal. (A similar issue was evident with TPG's uncapped broadband earlier this year.) We don't expect Telstra or Optus to enter the fray any time soon, but broadband cap increases do seem to be cementing in nicely as a trend. Thanks B for the pointer!
TPG Forum [Whirlpool]