They have since fixed this issue.
The Blog Rush widget is no longer showing on my site. See the message in its place.
Many bloggers have announced explosive growth 10 levels deep. There is a lot of buzz about Blog Rush so it would not surprise me if the shear volume of traffic is taking a toll on their servers.
Stats are still showing on my Dashboard, which is a good sign. John’s crew was quick to fix the stats issue at launch, so I am sure they are working as fast as possible to fix this issue.