As you may have noticed, my historically stable host of 5+ years, Linode, has been having repeated DoS issues in many of their data centers over the past week or so. They've been posting updates to their status blog pretty frequently as problems arise (bots4 is hosted in their Atlanta data center), so that is a good place to look if you're curious about what's going on. The problems have also been discussed on Hacker News.
These DoS problems have been translating into some periodic downtime for the game as well as perhaps increased latency. You can look at the game's public Pingdom uptime monitoring page to get an idea of how much downtime this is creating. It's short on most days (under 10 minutes), but there was 59 minutes of downtime on 12/27.
Short of switching to a new host, there isn't really a whole lot I can do. I'm not quite ready to leave Linode, so I just wanted to make a quick announcement that I'm aware of and am monitoring the situation. Sorry for the inconvenience and thank you for your patience. :(