By Theresa Neil Since the book focuses on rich interactions, I want to spend some time on Adobe Flex/AIR. These tips are based on the best Flex resources I have found, and how you can use them to craft a great user experience. This is part 5 of 6: * Play With It: 10 Explorers & Galleries * Learn From the Best: 10 Great Flex Apps * Learn From the Rest: 10 Great RIAs * Stock Your Toolbox: 40+ Custom