message from: https://bitcointalk.org/index.php?topic=345619.0
As of 2014-01-01 05:36 GMT, the network has re-synced and difficulty is going back up. The network becoming more resilient to DDoS attacks.
Other Nxt resources have also been experiencing attacks. Forums, wikis, exchanges, etc may be unavailable during these attacks. Somebody doesn't like Nxt.
The Nxt network is currently under DDoS attack! We need your help! If you can run a VPS node, it will help us stabilize and secure the network. If you have invested in Nxt, it is beneficial to you to run a VPS to help to secure the Nxt network. Hallmarking your node helps the network, but is not necessary.