Live at KSC: Weather 70% Go, update at 9 a.m.

The Air Force will release an updated weather forecast at 9 a.m., but earlier forecasts predict an optimistic 70 percent chance STS-126 will launch at 7:55 p.m.

Filling the fuel tanks will begin at 10:30 a.m. Check back for updates.

We'll have special live countdown coverage here in The Flame Trench and at our Florida Today Home Page during the run-up to launch.

As always, you'll get frequent countdown updates here in The Flame Trench, courtesy of Florida Today space business reporter Patrick Peterson. Patrick also will be sending out Text Message updates to those signed up for the service.

Go here to get hooked up: Text Messaging

Out on the Florida Today Home Page, look for us to start webcasting live NASA TV coverage at 2:30 p.m. Then we'll have live shots from our Florida Today blockhouse just 3.5 miles fromn pad 39A starting at 3 p.m.

We've got an awesome line-up of guests. Check it out:

-At 3 p.m.: Former NASA astronaut Loren Shriver will be at the blockhouse to talk about the mission at hand as well as a new software upgrade that would save Endeavour's crew in the unlikely event of an emergency landing at Kennedy Space Center.

-At 4:15 p.m.: Veteran Close-Out Crew member Mike Mangionne of United Space Alliance will join us to talk about suiting up and boarding the winged orbiter.

-At 5 p.m.: Boeing Flow Manager Mike Kinslow will detail the heaviest haul of supplies and equipment the shuttle has ever carried in one of its Italian-built moving vans.

-At 6 p.m.: NASA astronaut Janice Voss will chat about the extra science the U.S. and its international partners will be able to do once Endeavour's crew outfits the station for resident crews of six -- double the current number. And finally after 10 years of assembly.

-At 6:30 p.m.: Joe Oliva of Alliant Techsystems, also known as ATK, will cover plans for the first test flight of the Ares 1 rocket -- a developmental flight dubbed Ares 1X -- sometime next summer or fall.

-At 7 p.m.: Elliott Harik of Boeing will explain the trouble with the station's Solar Alpha Rotary Joint and how the astronauts intend to fix it during four spacewalks. Harik plans to show us the type of space grease gun the astronauts plan to use to rectify the problem.

-And at 8:30 p.m.: Florida Today Space Reporter James Dean and Todd Halvorson will wrap up coverage of what we hope is an on-time liftoff and a very safe and sucessful flight.

Join us.