Speed Up/Slow Down
Speed up/Slow Down in Sony Vegas
In Sony Vegas press and hold Ctrl-L, while holding those keys click the end of the clip and while holding it bring it forwards for Slow down and bring it backwards for Speed up.
Speed Up/Slow Down in Adobe Premiere
Right click on a clip and select Speed/Duration and play with the blue numbers
Speed Up/Slow down in Movie Maker XP
In Windows Movie Maker, just put the speed up or slow down effect on a clip. It automatically pitch shifts the clip for you (if you have the WMM XP edition). There's only 1 Speed up and 1 Slow Down effect but you can get more from the FX Archive. If you want to pitch shift the clip without speeding up or slowing down, then use Audacity.