Space Shuttle Discovery is set to launch in about 7 hours. Here's NASA's STS-128 mission page:
NASA - Space Shuttle
Mainly a re-supply mission, the crew is also delivering the COLBERT treadmill.
There are only 6 more missions left for the space shuttle after this one is complete.
The rest of the schedule is as follows:
STS-129: Nov 12, 2009 Atlantis
STS-130: Feb 4, 2010 Endeavour
STS-131: Mar 18, 2010 Atlantis
STS-132: May 14, 2010 Discovery
STS-133: July 29, 2010 Endeavour
STS-134: Sept 16, 2010 Discovery