If you’re interested in wringing the most out of Lightroom’s Flash-based Web galleries, check out the Bluefire Blog. It’s written and maintained by the guys at Bluefire, the Web developers Adobe hired to build the galleries. They get down to the nuts and bolts of how the galleries work, revealing hidden settings and more. Note that you can find the open-source gallery code on opensource.adobe.com.
Flash galleries are a big interest of mine, and I hope to have some more good news to share on this front soon. Stay tuned. [Related: Flash gallery hook-up for Photoshop.]