Neighborhood, 1.2 miles, time?

I'm starting this, to keep me motivated, and also to document my foray into partial barefoot running.
Today I did the loop around my neighborhood with truly bare feet. Prior to today I've only tried barefoot on grass and on the track. This was interesting. My feet were a bit tired, but the ground definitely worked on them. I expected this, but I see now why it is so important to train in small distances.
I did go for a 40 minute run in shoes yesterday and I had a great time, largely because my knees didn't hurt. Ever since I've been shifting my landing position as per the barefoot concept my knees have felt pretty good. I'm hoping that this barefoot thing will keep of the good feelings.