If you were hoping to buy today's 24 Hour deal, you might be out of luck at the moment.
The Unity Asset Store has been down for more than four hours. According to a tweet, they are recovering from server issues.
It is a little worrisome that this unscheduled maintenance is going on for a few hours now. Could the damage be extensive? Was it a malicious attack and is our information compromised? Only time will tell.
Update: The Store is back online but there's been no communication of why it went down.