If you aren't a poker addict yet, you now have a reason to become one. At least for a month. If you are already an addict, let me be your enabler*.
Simply by playing Texas Hold 'em everyday, you will have a shot at winning an Xbox 360 Elite, a set of poker chips, or some Microsoft Points via the Alltel Texas Hold 'em Challenge. The best part is that you don't even have to be good at poker (I'm breathing a big sigh of relief at this point) to get in on the prizes. You get one sweepstakes entry for every day you play Texas Hold 'em from now to July 12th. Winners will be selected at random so anyone could win.
Just be sure to register your gamertag first (We don't want a repeat of the Old Spice Gamerscore Challenge now, do we?) and then get to bluffing!
*: Disclaimer -- LunarDuality and XBLArcade.com believe that gambling addiction is a serious problem and encourage addicts to seek help. We are not responsible for any monetary damages you suffer after reading this post. Thankfully, XBLA's Texas Hold 'em doesn't use real money.