We may not be at GDC 07 (Games Developers Conference, going down in San Francisco March 5-9), but that doesn’t mean we can’t bring you news from it.

Without further ado…

Microsoft’s announced plans to launch a 512MB Memory Unit for the Xbox 360. It’ll hit stores on April 3, retailing for $50, and will be pre-loaded with the XBLA game “Geometry Wars: Retro Evolved” – but only for a limited time. Meanwhile, the 64MB Memory Unit will go for the bargain basement price of $29.99.

What does this mean? Well, the new memory unit is 8x bigger than the old one, so you can store and transport your gamer profile, save data, XBLA games and Live Marketplace content. It’ll also let you download exclusive content from any of the 45,000 Xbox 360 kiosks at retail outlets worldwide. (I feel like I’ve never seen one of these before though, unless they’re talking about Xbox demo units at stores – which, LAME.)

Don’t get too excited about all this mondo memory space though, because Xbox Live Arcade (the previously mentioned XBLA) games’ size limits are getting bumped up too. Developers now get 150MB to fool around with, up from the old standard of 50MB.

No word on what the deal is with the super nifty concept images of a black Xbox 360 floating around the Web though…

Forthcoming XBLA games you can look out for:

 “Boom Boom Rocket” (EA and Bizarre Creations). This eagerly anticipated title from EA and Bizarre Creations is a hypnotic rhythm music game that will launch on Xbox LIVE Arcade this spring, priced at 800 Microsoft Points.

 “3D Ultra Minigolf Adventures” (Sierra Online and Wanako Games). The first outdoor sports game on Xbox LIVE Arcade, “3D Ultra Minigolf Adventures” lets players putt their way through 36 fun-filled holes on wild courses that include settings such as the Classic Carnival and the fantastical Outer Space.

 “Eets: Chowdown” (Klei Entertainment Inc.). A completely revamped version of the popular PC title, “Eets: Chowdown” offers a fun puzzle game experience unlike anything else available on Xbox LIVE Arcade, and features new items and 120 new levels.

 “Jetpac Refuelled” (Rare Ltd.). This is a new take on Rare/Ultimate’s 1983 classic space blaster with enhanced graphics and Xbox LIVE features; players must clear a path through hordes of aliens to refuel their ship and amass a fortune over the course of more than 100 high-definition levels.

 “Pinball FX” (ZEN Studios Ltd.). “Pinball FX” offers an unparalleled pinball experience that will be fun for novices and experts alike, with realistic ball physics and stunning 3-D tables. “Pinball FX” also features real-time, head-to-head competition over Xbox LIVE and Xbox LIVE Vision camera support.