From Jayski.com:

Kenseth/Edwards altercation: on pit road at Martinsville Speedway after the Subway 500 Nextel Cup race, #17-Matt Kenseth and #99-Carl Edwards got into some sort of altercation which was aired on the SPEED Report Sunday night [and aired on Victory Lane the next hour]. SPEED's Bob Dilner was getting ready to interview Kenseth, when Edwards came over the wall to talk to Kenseth, Dilner backed away but the camera was rolling, Edwards pushed Kenseth away from Dilner down the pit wall, and was 'talking' to Kenseth, touching Kenseth the whole time, the camera then cut away to show Kenseth on the inside of the wall and Edwards on the outside, both drivers said something as they were leaving and then Edwards came back towards Kenseth and faked a punch at Kenseth, who flinched and looked surprised. Edwards then walked away and Kenseth came towards Dilner and that was it. No word on what the exchange was about or if there will be any penalties from Roush Fenway Racing or NASCAR. The video can be seen at SPEEDtv.com about 8 minutes into the Subway 500 video.(10-22-2007)