Update:
I got a reply to my second email just now:
MAR 24, 2013 | 05:31PM PDT
Joseph P replied:
We plan to have all the transactions go through and be cleared up by tomorrow. Thank you for bearing with us as we try to keep up with the growth of bitcoin! If you are still having problems by Monday then please reach out to us again.
We have been working hard to re-architect our backend to keep up with growth. The demand for bitcoin recently has been amazing and the site has received a large increase in traffic. We realize it is very frustrating to have transactions stuck in a pending state. Rest assured that they will go out. This delay definitely wasn’t our intention; the growth caught us off guard and it’s been pretty embarrassing to let down our customers.
This is probably as good a time as any to mention that if you are in the SF bay area and know an awesome software engineer, we’re hiring:
https://coinbase.com/jobs . As you can tell, we have no shortage of things we need to build!
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Revised date for expected time of withdrawal now changed to tomorrow.