So the situation with my home internet is basically that +Internode
are both doing the absolute minimum they can to investigate and fix the problem while seeking to pin the blame on the other.
After a lengthy volley in which both teams put in a valiant effort to avoid responsibility for fixing the issue, the level 1 support round has resulted in a victory for Internode, with conclusive evidence being produced that my line is "unbalanced" and can barely support an ADSL1 connection let alone an ADSL2+ connection. After the half-time break, play will resume in the all-important level 2 support round with Internode taking the serve and hoping to knockout Telstra while they are on the defensive.
Lucky this has taken nearly three weeks to play out - otherwise I wouldn't have been able to handle the excitement!