Update: Per PG's post at the location below, it looks like I can query once per minute safely. I'm going to do better than that and query once every 2 minutes.

Update: Per PG's post at the location below, it looks like I can query once per minute safely. I'm going to do better than that and query once every 2 minutes. Hopefully a 2 minute delay won't be too much for HN readers to bear. http://news.ycombinator.com/item?id=1721105 http://news.ycombinator.com/item?id=1721105