WOW! I just found this thread and amazed at the different HRC's people have been to. I've been a HUGE t-shirt collector and just recently a Huntington Bear Company collector Here's a list of where I've been:

Houston (hometown)
Dallas (first ever HRC I visited, the original)
New York City
Washington D.C.
Baltimore
Orlando
New Orleans
Austin (sad it's now closed)
San Antonio
Phoenix
Denver
San Francisco
Los Angeles Beverly Center
Los Angeles Universal
Maui
Guam
Makati-Manila
Buenos Aires
London
Paris
Berlin
Munich
Rome
Amsterdam
Madrid
Barcelona
Montreal
Toronto
Tonronto-SkyDome
Niagara Falls Canada
Niagara Falls USA
Las Vegas
Las Vegas Hotel
Atlanta
San Diego

Friends/family got me stuff from these HRC's:
Beirut
Kona
Stockholm
Key West
Nashville

Mad that I didn't make it to the Sydney one, but vow to visit it some day soon! Can't wait to add Lisbon, Oslo, Dubai, Hong Kong, Singapore, Osaka, Melbourne, and Narita to my growing list!!!!!!!!!!