I sent a few hundred emails using a smart list filter this morning. 1.5 hours later, all are still showing in "pending" status. As a test, I chose one person and manually sent an email to this record. I got the same result. It is now several minutes and no email send.
Is there something wrong with Marketo today? I don't see any other messages, tweets, or indications of an outage. Emails sent fine yesterday using the same smart campaign.