Installed the latest Intel drivers, and I am getting around 3.5 M/hash on average. Worth it to keep around?
lol - That should make you around
BTC0.0002 per day or $0.04 per 24/hr.
http://www.bitcoinx.com/profit/Your Surface Pro retails for about $1,000.
Therefore, if you want to risk burning out the unit for a single dollar ... do it!