Sorry, the "3 wheel motion" is NOT the cause of the thunk/clunk. Honda of Canada has admitted that they do know of the problem with the MP3 and the mysterious clunk sound. Apparantly japan is "working" on a fix. They think it's the shocks. Personally, I think it's something else.
I've said it 1000 times, I'll say it again, that you can make the car clunk without even driving it. Just lean on one side a LOT, and get it swaying left/right, and you'll hear it.
But, I do agree with one thing, that Honda hasn't made a great handling car in years, at least not the civics, and accords. The new Mazda's remind of the old Honda's in that they feel like they are on rails.
Honda is taking the fun out of their cars and making them more "practical"......yuck, I hate that word.