Nintendo's WiiWare service just launched in Japan and it's set to debut in America this May. WiiWare has opened up an exciting new retail avenue for third-parties whose games don't show up on traditional store shelves. One such company is XGen Studios, best known for its titles Defend Your Castle and Pillage the Village -- simple, but addictive efforts that have been played hundreds of thousands of times on the Internet. Recently, XGen revealed that it was planning to bring a completely overhauled version of Defend Your Castle to WiiWare. IGN caught up with company CEO Skye Boyes to talk about the project, about the WiiWare service in general, and more. XGen was also kind enough to provide exclusive new assets -- screens and videos -- of Defend Your Cast on WiiWare.