Apparently SIG has finally done it - Gunblast had a picuture up of the P239 in .45 at the Shot Show. Here it is, courtesy of Gun Blast:
For those of you that aren't familiar (far-fetched given this crowd, but possible ), the gun can briefly be described as a DAO, two-tone, dehorned, single-stack pistol specifically designed for CCW. It has limited capacity (in .40 I think it's like 6+1, IIRC), but for those of us on the prowl for a .45 to fit our CCW needs it is a welcome option.
You could say I'm more than a little excited by this news. I absolutely cannot wait to get a closer look at this gun.