NASA has just released an updated schedule for the two remaining space shuttle launches.
The next mission, STS-133 aboard the space shuttle Discovery, is now targeted for November 1, 2010. The final shuttle mission, STS-134 on the space shuttle Endeavour, is now planned for February 26, 2011. The schedule shifts are apparently due to delays with the payload hardware.
Read the full press release here : http://www.nasa.gov/home/hqnews/2010/jul/HQ_10-157_STS_Launch_Dates.html