What about this...
To Washington
Chicago's 2004 1st rounder, #3 overall
To Chicago
Washington's 2004 1st rounder, #29 overall
Washington's 2005 1st rounder
This way more than likely the Blackhawks still get a top 5 pick because I don't expect the Caps to be that good next year either. This would give you a better shot at Crosby, and even if you don't get him next year's draft is supposed to be deeper than this years (I think

).