I just looked at the new Tekkit 1.5.1 thread, Read the list of mods (and "other mods") And then noticed: "Hey, where's Industrialcraft?" I then nearly threw up as I read the list multiple more times, Trying to find the words "Industrialcraft 2" or "IC2". Anyways, Industrial Craft, We will miss you.
EDIT: Oops, must have misread something, sorry. Did not read the words "Open Beta", And I thought when they eluded to that some mods were removed, I instantly jumped to conclusions when I didn't see IC2.