Blackberry are currently offering free Signing Keys for mobile and tablet devices.

If you are interested in porting your Flash content to the newly released Playbook, or you want to make content for any of Blackberrys handsets, then you need signing keys to be able to do so. Apple currently charge developers $100 a year for access to their app store, however Blackberry are currently giving the keys away for free in a bid to increase the amount of content on their store. Even if you have no immediate plans to create content for either their mobile or tablet products, it still makes good sense to pick up some keys for them while they are free.

Get Blackberry Playbook and Mobile device signing keys for free at https://www.blackberry.com/SignedKeys/.