Crunched a few numbers:
At 1g, you could accelerate for 353.8 days and still not reach the speed of light (barely).
During that time, you would travel 2.85 E12 miles (yes, Starhawk, that's
teramiles 
)
So if you would start decelerating at 1g at the halfway point, you could travel ~5.7 E12 miles (just under 1 light-year) in 2 years.