Crosstalk hasn't reached its wishlist critical mass by today's release date, so it is postponed to a later date this year. Valve and other sources maintain that wishlists are a critical component of release time traction, and there is only one Crosstalk release, so it's better to have it once there's enough people to see it.
On the development side, things are going well, and the Second Reality DLC went out two days ago. The only constraint is the public interest at this moment.
Thanks for your understanding!