Flash is definitely the way to go. Flash's capabilities as of Flash 9 are astounding, and from what I've read about Flash 10, its only going to get better. The

Flash is definitely the way to go. Flash's capabilities as of Flash 9 are astounding, and from what I've read about Flash 10, its only going to get better. There are also other plugin platforms to look at. Shockwave for example. With that in mind, there are some games that simply can't be produced in an online format. So make sure that a web browser is the right channel for your game.