We have released Gravity Forms v1.3.13 Beta 2. This is primarily a bug fix release for Beta 1, however we have implemented a new feature for WordPress 3.0 Multi-Site users that allow you to pre-define the license key so it is pre-populated on network site activation.
Get details here:
http://www.gravityhelp.com/gravity-forms-v1-3-13-beta-2-released/