Just back, and a full trip report and reviews to follow, but for now.....
RobinMarie:
You DO have to pay for parking, but depending on your plans, there are options. Our tourguide at DC said that if you are planning on visiting seaworld for at least 2 days, there's a 'Parking upgrade' for $15.00 that gives you unlimited parking for 7 days.
If you're really cost conscious, the Renaissance has self parking for 6 dollars/day (I think it's available to anyone---you could say you were coming for breakfast or something) and it's an easy walk across the SeaWorld parking lot to the main entrance.
Someone else asked about the Video at DC---it's available in both NTSC and PAL formats.
More later....
Scott
BTW, the whole trip was WONDERFUL!!! DC is an unbelievable day.