It's still a bit unofficial but it's back nonetheless!
The rules are online on the US GW site: http://us.games-workshop.com/games/40k/gaming/spacehulk/default.htm . When I get around to it I will certainly have a good read on how this works. Rico should have enough terminators to face some genestealers (or atleast that's what I'll let him think).
It will be fun to play in the summer holidays. I'm looking forward to building my Fex with carapace that is. I don't care if it costs a lot, 3+ save is crappy and will make a T7, 5W critter still vulnerable. I think I might make a 2+, T7,5W regen fex with venom canon and talons or crushing claws and some other CC thingies. Oh boy this is gonna cost but it will be terrifying.
Also have a look at pre-3rd Ed models and their background. Especially the first rippers are very funny: http://us.games-workshop.com/games/40k/tyranids/extras/evolution/default.htm
I think I will use some lictors also because they now can deepstrike without scattering further then the edge of a terrain piece and can still assault. So that's that for putting basilisks directly behind cover.