Work on the 1.3 version is almost done now. Launch will be in a day or two. Lots of tweaks, balancing and stat changes that make the Tyranids alot deadlier as a faction. They all have constant regen for one thing. As a sneak peek here is the new Tyranid Titan that will be playable for Campaign and Skirmish:
Unlike the Ancient one, this Titan class entity is not half dormant, and can thus use abilities like rush and tentacles.