Our friends (not) at domaintools.com last hit my site from:

IP: 216.145.11.94
USER AGENT: "Mozilla/5.0 (Windows; U; Windows NT 5.1; en; rv:1.9.0.13) Gecko/2009073022 Firefox/3.5.2 (.NET CLR 3.5.30729) SurveyBot/2.3 (#*$!)"

and...

IP: 66.249.16.211
USER AGENT: "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.3) Gecko/20091020 Ubuntu/9.10 (karmic) Firefox/3.5.3 GTB7.1"
Also:
"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/534.51 (KHTML, like Gecko; Google Web Preview) Chrome/12.0.742 Safari/534.51"
...and a few others, no clue

Whois:
The Endurance International Group, Inc. BIZLAND-FC01 (NET-66-249-0-0-1) 66.249.0.0 - 66.249.31.255
Name Intelligence, Inc. NAMEI-NET-1 (NET-66-249-16-0-1) 66.249.16.0 - 66.249.17.255

They took a screen shot from:

IP: 64.246.165.237
USER AGENT: "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322)"
Whois:
Name Intelligence, Inc. NAMEI-SEA5 (NET-64-246-165-128-1) 64.246.165.128 - 64.246.165.255
Compass Communications, Inc. CCOM-2003 (NET-64-246-160-0-1) 64.246.160.0 - 64.246.191.255

Also screen shots from:

IP: 216.145.16.235, .236, .237, shared with AboutUs.org, screen shots on their site
USER AGENT: "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; GTB5; .NET CLR 1.1.4322)"

That's a lot of IP addresses, sheesh!

Update: I found even more of their junk, tons of stuff, maybe I'll do a full post if I can find the time, it's very prolific