The only one we've seen so far is the Zann Consortium bombardment; it consists of a two-blast attack with an electronics-scrambling EMP blast arriving just ahead of a destructive cannon blast.
From Petroglyph comments, I assume that the Rebel attack will be something like an ion barrage or a dispersed cannon barrage. The Empire, as pretty much everyone suspects, will probably be a hard-hitting, ground-pounding turbolaser assault.
Marsman, towards the beginning of this thread, Darth Torpid mentioned:
Originally Posted by Darth_Torpid-PG
it is still much more powerful than bombing runs