Steam now offers preorders of The King of Fighters XIII Steam Edition, confirming the recently revealed Windows edition of SNK's fighting game (thanks Joao). They offer 17% off on the pre-purchases, and also provide this link, which is where to register for the chance to be selected as one of 300 beta testers. They list a September 17th release date, and outline fairly modest system requirements. They also describe some PC-specific netcode enhancements:

"THE KING OF FIGHTERS XIII Steam Edition" now features vastly improved netcode that will provide you with the most comfortable online experience yet! The new netcode features improved communication speeds between you and your opponent, and also tailors your online experience according to your PC environment!