This sounds similar to a situation I had with my distributor before it went out. The squeek was rather intermittent and eventually it just started squeeking all the time lightly and would disappear sometimes when I would rev. Anyways back to my diagnosis. On my distributor it ended up being the little bearing on the shaft that the rotor mounts to. The bad news is that its in a part of the distributor that is labeled as "do not disassemble", so I take that to mean don't mess with it and even if you do there won't be a part at honda you can get to replace it with. The good news is I come on this forum and give you the info for free before your dist goes out and you get stranded like I did.
Edit: get a new dist
