I've been meaning to mention this for days now. But I don't live in NOVA and the trip from Tyson's Corner to Dulles is not regularly on my agenda.
Hans Mast has been covering the proposed rail line through Tyson's Corner and the seemingly dumb decisions that have been made regarding it. Check it out;
No-Bid Contract: Dulles Metrorail Extension
Metro Tunnel Underwritten by Tysons Businesses
And these, his contributions at Raising Kaine;
Hans has really done his homework on this very interesting subject