Microsoft has announced that registration is now open for the first two Xbox Live Arcade Challenge events featuring the recently released Xbox Live Arcade titles Lumines Live! and Small Arms. Competitors in each event have the opportunity to win prizes ranging from a high definition plasma TV to Xbox hardware and Microsoft Points tokens. Xbox Live Arcade Challenge is a brand new program featuring fully integrated global tournaments designed specifically for all people playing Xbox Live Arcade games. The program is for all levels of gamers – those who like to compete and win, and those who simply want to play and join in with friends. Check full article for details.