Grocery App for Android and Windows 7 phones?

[Kalifornia]

My wife just got a free Samsung Focus (running Windows 7) and I have a Captivate (Android). We are looking for a shared grocery list app similar to OurGroceries, which was perfect when she was using a BlackBerry phone. Unfortunately OurGroceries doesn't support Windows 7 mobile.

Any suggestions on what might work?

• Must be free
• Offer PC access as well as mobile
• a general task list would be fine as long as the other requirements are met