At the Game Developers Conference in San Francisco Microsoft announced plans to launch a 512 MB Memory Unit for the Xbox 360. YEA! Who doesn't love more memory? The 512 MB memory unit will become available worldwide April 3rd, 2007. Price point looks like $49.99 in North America. It will also come pre-loaded with one of the most popular arcade games ever - "Geometry Wars: Retro Evolved" from Bizarre Creations. Meanwhile, the original 64MB Memory Unit will drop in price from $39.99 to $29.99. But wait, there's more, there will also be an increase in the official size limit of Xbox live arcade games from 50 MB to 150 MB - that starts right now.