On Fri, 19 Jan 2007 20:34:03 GMT, (Derek Lyons)
wrote:

Since I'm headed to Jacksonville in Mar to visit my relatives, I
thought I'd try to see STS-117 launch as well. What is the earliest
date that the launch date can be reasonably considered to be cast in a
substance firm enough to reasonably plan around?

March 15, 2007. They're still officially aiming for March 16, but look
for this to move up one day.

Brian