I would say it isn't normal. The difficulty is being sure of your interpretation of clunky. Mine makes a couple of noise as it is pulled in and locked. Also it makes a litte noise when reading, as would be expected.
That's exactly how my macbook sounds. I don't know whether it's normal or not but it seems to be working just fine.
my c2d macbook has the same clunk
took it to apple and they replaced it
still had the same noise!
no problems using it ever and works perfectly fine
the price you pay for a cool look disk slot in a lappy!
I just purchased my MacBook a few days ago and was a little alarmed to hear that same sound. Mine sounds just like the video that was posted. Since one reader had their drive replaced and it still sounded that way, it makes me think that it should be OK. I would really like to know if other owners have the same clunk. Is it normal??