GLF## at kilo, with delta, ready for departure, QFE
GLF## this is approach, contact tower 12
..
Sorry about that, will contact tower on
..
Ahh the old 'wrong frequency' chesnut... done that a few times, though it was spotted by my instructor rather than any controllers - made a CTAF entry call on area frequency :oops:
--best one was heard rather than made by me though: call went out "Sydney Radar, ABC, request..." - reply: "I'd love to approve you, but this isn't Radar - try 12x.x", followed by "oh... BOTHER!!!".
(well, we laughed...) 
Meanwhile no flying for me until instructor gets back from holidays
, I'm gunna take a full week off work early in the new year and spend as much time as I can at the airport - I figure I've got to get at least ONE day of decent flying weather in seven!!!
Anyhoos... all the compliments of the season and all that to all...
Adam