In my opinion, it's completely wrong-headed to imagine that there's any barrier to any PMC choosing to open a simple beachhead on SO and posting a link like http://stackoverflow.com/questions/tagged/caliper on their web presence.
The arguments here are reasons why a PMC might choose to put more or less (or no) emphasis on it. If this here PMC decides to consider something else, it will open a hailing frequency to SEI and see whether there's any meeting of the minds about licensing and branding and all that stuff. The QA format, in my opinion, is a very powerful tool for some kinds of collaborative assistance, and a completely useless tool for others. It's much easier to find a question with answers than to find a mailing list thread. It's on the other hand pretty silly to engage in any sort of extended interactive assistance on it.
