Our colleagues at SonicWall had a hiccup of sorts with one of their licensing servers this week. It erroneously suspended subscription services including gateway anti-virus/antispyware and web content filtering.
While most units were unaffected, the unit in our office was.
We received at least four communications on the topic asking us to check the devices we manage to ensure everything was OK. They also released an online tool to alert you of any units affected by the issue.
It's nice to see SonicWall be so open and proactive about this issue.