Hmm... Good point. I'll fix it so PUBLISHED submissions become the property of Ambient Inc.
And we will have ALL rules-related material released as OGC except for certain specific PI items (the name Donbian, whihc is PI belonging to Shawn Muder who is writing a bunch of spells in this volume, for example).
So if you are submitting a feat, spell, magic item or prestige class, we'll be releasing it back out as OGC anyways, so you can then re-use them. If you are submitting other material, indicate that you want it all released as OGC, and we'll do so.