Megabus.com is celebrating its expanded service by offers 10,000 one-way bus rides between select cities and Washington D.C. for FREE for a limited time. To get discount, use the coupon code: ILUVDC at checkout. Tickets are available for reservation now for travel starting December 15 through January 15, 2010. Seat availability at this discounted price is limited and varies by date. Megabus.com is also offering many seats at a special introductory rate of $1 without a coupon.