Yesterday we mentioned about Samsung's unofficial/official response regarding the expansion card issue. Now today, Sandisk appears to be taking the lead in selling "certified" expansion cards for Windows Phone 7, ranging in sizes form 2 to 32GB.

While the whole certified business always seemed to be a part of the plan, it looks like Microsoft and partners were caught a little off guard by the whole situation, causing AT&T to revise their position many times and OEMs to scramble to offer up support. Things though finally look to be falling in place and considering we're only 1 week into the U.S. launch, it's not too bad.

However, buying these official cards will cost you. The 16GB version will set you back $115 with shipping and the 32GB will run you a jaw dropping $206.

Source: Sandisk; via wmpoweruser