I get an error from that site too ("reporting engine is down!"). Is the site posted here directly querying the DOT database and knocking it offline, or just a coincidence?
> ** Planned Outage: A planned maintenance is scheduled this Friday July 19th 11:00 pm EST thru Saturday July 20th 11:00pm EST. During this time, the reporting engine may be down. Sorry for the inconvenience. **