Ex-spouses are perfectly capable of playing it cool professionally...aren't they? One year ago Mike Lundquist was a nobody sports writer. Now he's the hot racing columnist. And he's genuinely shocked to spot his ex-wife swapping canap s with the guys. What's she doing on his turf? Taylor Robinson knows the media. She knows NASCAR...and she's determined to be the best PR flack this side of the Smokies. Her swagger lasts all of two hours, though--until...