Some time ago we made mention of a homemade Windows Phone pouch that mimics the Metro/tile interface. Jessica Engstrom, the Swedish designer, seeing that there were no cases for her Windows Phone readily available, created the pouches out of necessity.
Jessica has now produced a limited quantity (I'm sure that will change once sales of the pouch start rolling in) of these bags and have made them available for sale. They are available in blue and pink tiles and will run you $22 each or buy both (the duo pack) for $39. Prices include shipping and Jessica is set up for Paypal payments.
You can get all the information on purchasing the Windows Phone 7 Pouch at Jessica's website.