http://www.intomobile.com/2010/05/12/kin-windows-phone-7-a-lot-closer-than-we-thought/
Article is from last May so maybe by this summer when the WP7 gets more users, there will be some upgrades, not holding my breath, but atleast this soundbite shows their is a potential still to get the KIN with an apps store. My thinking is it will be through the Zune software. Seems possible just not sure if the WP7 phones fail like the KIN then those hopes are greatly diminished for all us KIN users!