Essential to me and many of my friends is the license for Wave. The patent license has already been posted. It is short and it is sweet.
"Subject to the terms and conditions of this License, Google and its affiliates hereby grant to you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this License) patent license for patents necessarily infringed by implementation of this specification. If you institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the implementation of the specification constitutes direct or contributory patent infringement, then any patent licenses for the specification granted to you under this License shall terminate as of the date such litigation is filed."
In addition to the license, a contributor to the protocol has to provide either an individual or an organisational contributor license agreement AND in order to get a patch to the protocol accepted, a production-quality patch for the reference implementation has to be provided.
For Wave technology to succeed, is must be easily adopted and be adopted as widely as possible. Given that Wave is based on peer to peer technology, only by making client or server applications available cooperation can be ensured. By restricting the use of software cooperation in a Wave is prevented and the usefulness of the functionality is reduced