You could try turning it on for 10 or 15 seconds,WITHOUT trying to crank....that will get the fuel pump putting fuel pressure up... turn it off and then try to start it normally...I think it was Rob that mentioned that in another thread....

If it cranks and dosent start, it is likely the crank position sensor.... the camshaft position sensor will give the same symptom, but I havent heard of one going bad yet.... are you getting any codes? Usually you will get a CEL and a code(P0335 for crank sensonr) if it cranks and dosent start...