This was on the Sky News cable channel this morning. I couldn't find a clip of this on their website (news.sky.com).

It showed a piece maybe 6 feet by 4 feet that had a window in it, and another strip about 7 feet by 1 foot. Each piece was just laying on the street by itself. Both pieces seemed un-scorched and relatively unbent, which is surprising given the violence of the explosion and the fireball. The "plane" was supposed to have had ~1000 pounds of fuel on it for the trip to Missouri. The pieces almost looked as if they might have been cut out of an intact plane and placed there. They didn't show anything else that might have been from the fuselage. The damaged cars in the vicinity were heavily scorched and many of their tires had burnt away, leaving only the rims.

The Learjet 55 has a "length of 55 ft 1 in, a wingspan of 44 ft 0 in, and a height of 14 ft 8 in". (link) I wish they had shown more of it, if it was there.

That hole in the ground, which I also saw on Sky News, looked to me more like it might have been made by a missile.