Check out http://www.un-earthed.co.uk/ and at the top right you can see the tear down page that links to avivadirectory.. anyone know how this is done?
yes, very cool effect. it's done in flash, the new versions of flash allow the program to 'extend' out beyond the original file size. so if you have a flash file that is 100 by 100 pixels the file can actually 'grow' outside of those dimensions when the user rolls over the flash file--unfortuantely, that's the extent of my knowledge.
there is something in joomla that does this, i can't be sure what it uses but i would imagine it would give reference to the original code through joomla.org
Hey, don't bother paying for it, here is a free one, with instructions for install too http://www.webpicasso.de/blog/pageear-free-peel-away-ad/