there wont be any headers... being the manifold is part of the head... they probably will make aftermarket down-pipes though... in the future.

The intake should be the same... its the same engine compartment in both cars.

For wheels, use anything that will fit a 98-2002 accord V6... as all the new accords use the 5x114.3 bolt pattern.

It'll just be a matter of time now... the cars are in full production... aftermarket stuff is not far to follow. Comptech and AEM are usually the first companies to come out with new Honda parts (go figure on the comptech stuff!).