T-Mobile announced that T-Mobile Android device customers(myTouch 3G, G1, Motorola CLIQ, Samsung Behold) will receive an update to the Android Market application that allows for purchases to be charged directly to their T-Mobile account. 

It makes it easier because customers don't have enter Google Checkout information. 

• The Market application is  invisible to users. No steps are necessary to receive the update.
• To ensure that the update is received by all users T-Mobile and Google will stagger the update.  Everyone should have the Market update by 12/30/2009.
• Once you receive the update you will be able to purchase paid applications using your credit card or your T-Mobile account. 

If for don't ever use the paid app. Any applications uninstalled within 24 hours will NOT be charged to your T-Mobile account or credit card.