WP7 incentive to keep you from buying those oh-so-distracting iOS and Android devices? Well, that official homebrew love is going to cost you -- $9 to be exact. We already knew the Microsoft-sanctioned ChevronWP7 Labs would be open for business soon, but recent tweets from the jailbreaking outfit's Chris Walsh have shed a little more light on the process. In addition to the nominal fee users will have to fork over for the official unlock, Walsh also points out that software updates to Mango and Nodo will close any security holes in the platform. So, if you were planning on getting your pirate-y hands dirty hacking away at WP7, think again -- Microsoft's still got the keys to its mobile OS' house.