According to my web logs (not the same as weblogs), there was a visitor here at about 8am this morning from house.gov. Specifically:
01 Jun, Thu, 08:24:27 housegate10.house.gov MSIE 6 Windows XP
That address sounded strangely familiar, so I had a quick web search and found the following: this reference (it's actually a proxy through which most House traffic [Not To Be Confused with House traffic, dedicated to the TV show House] passes).
Unfortunately, the arrival time doesn't coordinate with any particularly juicy search queries or interesting referrers. A few weeks I got a couple of links from a yahoo group called b4ta, but was unable to find the message linking here.