CaliBasco- great comments! JoeSambuca - far and away the best line of the week!
Have to agree with Jo-anne about the mugs - you don't really want us to :p to go digging thru purses, back-packs, suitcases, etc. in order to find our mug to wave at someone who might be on of us? Wouldn't that sort of be saying - Hey I'm a tourist - can I have some of that rosemary pluz?
Really do think luggage tags are a super idea - affordable from MM's perspective - download only. If you are able to get gratis art-work - what about suggesting that when there is a MM dinner (Madrid/NY/LA/etc.) everyone show up in their MM T-shirts? That way everone can find each other and we can always wear the T over or under what we planned to wear anyway....
Just a thought