Yes there is and I have been using it for a little while now
If you look at the discussion WP linked to then you will see a marking block mock up I made. Mike Churchaward developed this for me and he also put together a new marking page.
Hopefully it will be released very soon. Just some problems on my side holding things up a little.
Oh. Also deals with resubmissions, resubmission requests and echo-assignments to name but a few.