I'll have to bring a couple bottles - I can't show up to a tasting without at least one bottle from Italy.
As for the Aussie theme, however, I've got some stuff, but they're recent vintages, and not "big names" except for the Dead Arm. Actually, I think everyone in this group has at least a couple bottles of Dead Arm. lol. I would imagine the easiest thing to do would be to pick a theme, if desired, and then people can post what they want to call "dibs" on to ensure no duplication.