well I will say this much...my car at a stop light goes down to 500 and it does not shake whatsoever...my mechanic when I had my old car (it shook) he said that I need to advance the idle a little bit...I am undsure where it is on the Accord's (at least I haven't found it on mine) another thing is that he said it was because of dirty injectors...I would try some Chevron injector cleaner and see what the results are.

Matt