http://img246.imageshack.us/img246/4515/routervsmodemgooglesearku5.png
[look for something like: "Discussion forum: 3 posts – 2 authors – Dec 8, 2001"]

The preference cookie (PREF) this time is (with line break)
ID=00fb173daf8671b1:TM=1211773860:
LM=1211774226:GM=1:S=iRC8su7T5V-q6T0t

The cookie also triggers the experiment version (blue theme) of Google Maps.
http://googlesystem.blogspot.com/2008/05/google-maps-facelift.html

I had always hoped Google Groups would start indexing HTML web forums, much as Code Search now finds snippets of code in regular web pages.

Great, I hope they will make this official soon, I like it really well. I hope they will also use this to downrate results with only 1 post. As I come across them quite often when searching for seemingly random errors.