Sorry to interrupt the v6 chaos discussion, but I figured that
this might be of some interest to folks on the list.
Since the IESG, IAB, etc. has forward this to the RFC Editor
queue to be published as an Informational RFC, I think is a good
thing.
One thing, however, that troubles me, is the title -- which I think
is somewhat misleading.
While I think it is a fine and thorough document, it is really
not about mitigating TCP SYN flooding attacks, really, but more
about lowering the threshold of pain.
In any event... it's a nice document. 
FYI,
- ferg
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