If you are ever looking for geyser data, I helped build an ODbL database of observations -- http://geysertimes.org ; API: http://www.geysertimes.org/api/v3/docs/index.html. We use the data to predict geyser eruptions when enough data are available. For instance, here's the next prediction for Old Faithful (JSON / unix epoch): http://www.geysertimes.org/api/v3//predictions_latest/2 -or- (cleaned up): http://geysertimes.org/predictions.php