We may be on the same plane! I was going to hang around the airport as I am only booked into the hotel for the Thursday. There is also an express bus service as well as cabs at the airport.
Apparently there will be buses one single convoy from the original olympic stadium. Also when researching how to get into Athens from the airport there appears to be a decent metro system so I think getting around should be fine. I am really looking forward to this one. I've really only got one...