Jeff Quinn of Gunblast.com shows some of the items he looked at in the first day of the SHOT Show. One that caught my eye in this video is the Micro Kimber that shots .45ACP but looks to be the size of a Sig P238/Colt Mustang.
Go here for a series of still photos of various firearms taken by the Quinns.
If I heard things correctly, that Kimber Micro was a mini-1911 shooting 380 ACP.