These guys seem to think red shift and Doppler shift describe the same phenomenon:
http://www.answers.com/topic/redshift
http://zebu.uoregon.edu/~soper/Light/doppler.html
http://hyperphysics.phy-astr.gsu.edu...ro/redshf.html
If light is being emitted from a source at 3x10^8m/s and I travel away from that source at 1x10^8m/s, then the light will approach me at 3x10^8m/s - 1x10^8m/s = 2x10^8m/s.