I would like to be able to design "feature-rich" Web content, but acquiring the necessary tools is the essential first step. Adobe's Flash CS4 is rather expensive. A less expensive commercial application, Swish, has also come to my attention. There is also the open-source FlashDevelop for Windows, which is free.
An intriguing possibility is to use Linux as a platform for this purpose. An open-source plugin for the Eclipse IDE is supposed to provide this capability. I'll try it on Sunday, after I get home and have a computer running Linux at my disposal.