Couples can save US 766 on Brendan's Best of Italy and Greece coach tour departing April 17th 2010. While it's heavier on the Italian portion of the trip, the tour spends five full days in mainland Greece and ends in Athens, letting you continue with other Greek adventures into the islands if you wish.
The discount is taken off of the base price of 3825 per person, double occupancy. The trip includes all breakfasts and some "Highlight Dinners"; lunches are on your own. The promo code for the trip is LMD165, which must be entered at the time of booking on-line. The trip must be booked by March 31st.
One quibble I have with this tour - they call it a 16-day trip by counting your flight to Europe as a day, but the airfare is not included in the trip price. For comparison purposes, think of it as a 15-day trip. Here's the full itinerary.