Just be sure to make certain you all don't have to travel too far, after all we wouldn't want anyone to get the idea that there is an I at the beginning of ITG.
Alex - I like the idea of Athens - Greece has always appealed to me
If I can remove my tongue from my cheek for a moment, if you work somewhere that is interested in hosting a conference I seem to recall that 2009 is still awaiting a venue and host.
ITG Web Site - Conferences will give you a list of all previous conference venues - I have to admit, my US geography is not good enough to answer whether there has ever been a conference in your neck of the woods.