Our wiggly days are past thank goodness but we still have all the videos/DVDs, and even the rare first CD featuring the fifth wiggle....
DS was obsessed for a while, and we happened to visit Sydney once when one of the Darling Harbour monorails was done out in a Wiggles theme - Dorothy the Dinosaur & co all over the outside, top Wiggles hits playing on loop inside the carriages - we must have spent several hours on that train in the space of a few days, and I was going crazy by the end of it.
There was a brilliant spoof story about the Wiggles breaking up a few years ago - the original blog it came from seems to have disappeared, but there's a copy of it here.