I heard from a community member during a chat session at the CES show that they thought the RICOH Dev Kit was coming out in April. I do not believe RICOH made an official announcement as to the release date.
Note that the RICOH Dev Kit is NOT branded as a THETA. It is probably the same underlying technology and form factor, but the announcement indicates that this is really a Dev Kit and not intended for consumers. Still, it does look interesting to me as well due to the internal equirectangular stitching capability.
It might be interesting to test one unit, but for multiple unit in production use, it may be better to wait for the next generation THETA. No announcement from RICOH on this yet.