I started playing with this over the weekend. Great stuff. Also, if you're on the fence about whether to use this or Kibana, they're compatible with each other

I started playing with this over the weekend. Great stuff. Also, if you're on the fence about whether to use this or Kibana, they're compatible with each other, so give them both a try. (Set up Graylog2, point Kibana at G2's elasticsearch instance, profit.)