Having naips on the go might be nice, but airservicesaustralia (dot) com/brief is free, can be accessed by any smart phone and works just as well..
I just use an el-cheapo telstra prepaid T106 and it works ok at FL210 in outback Qld.
I've had mates with Telstra Iphones and they noted that the Telstra ones have an internal aerial modification that allows them to work on the Next G network - they had pretty good range too.
With respect to using BOM radar - I would be cautious about relying on it in flight... No one should be flying amongst Charlie Bravo's without an onboard Wx radar, its just plain dangerous unless your machine is built to pull >10G's