Now this obviously isn't the biggest news out there, but it is interesting. Apparently (this also from Zulgad) he was a running back in high school and also occasionally at West Virginia, so the switch shouldn't be too difficult. I dug up his stats.
From cbssports: "Had 236 carries for 1,889 yards and 37 touchdowns as a senior, with nine 100-yard rushing games"
And his college rushing stats, from ESPN:
If this does go according to plan, it would probably mean the Vikings wouldn't target a running back in the draft since they would have Peterson, Young, and now Reynaud in the backfield. Because of this, we can now use a draft pick that might have been used on a running back to fill another key position.