No I haven't Ric, but I have had my modem replaced once under warranty.
I put my name on the list for an upgrade to the NBN satellite yesterday. There's apparently some new gear involved in that too. Not sure how long it'll be till I get to the top of the list, but it should be worth it. I'll go from 3GB peak and 12 GB off peak to 20GB peak and 20GB off peak for $10 more a month!
Al.