Here is my updated version of a FAQ for Planetstrike. I could use as much feedback as I can get.
Comms Relay: Counts as an artillery piece. Can be targeted separately unless it is part of an intact building, in which case a "Weapon Destroyed" result can take it out. Models don't have to be on the roof to use it.
Bastion Turret Weapons: Use a BS of 2 as normal, but if a occupying model is on the roof he may use his own BS instead (and may fire at a separate target).
Crash and Burn: If a Hit is rolled, use the arrow to show what direction it scatters but it will only scatter half the number rolled on 3d6 (round up). This same rule applies to any stratagem that rolls 3d6 for scatter (I'm beginning to be not so sure about this one).
Laserburn: The affected area is treated as Dangerous terrain afterward. If one of the markers goes off the table edge, the strike will still hit, but measured from the point where it exited the table.
Teleport Barrage: Models on the roof are not affected.
Krak Attack: If used on a drop pod, it strikes the pod and not the unit inside.
Other: Chaos Daemons may use the Blasphemous Broadcast, Euclidean Mindphase and Hellish Cacophony stratagems.
Chaos Daemons: Follow the Planetstrike reserves chart instead of normal deployment (I'd like a Daemons player to chime in on this one).
Here's another question, should Automated Weapons still be allowed to shoot even if the building is shaken? They are machine spirits after all. Last game that's how we played it, I'll have to try some games both ways.