The Google Bay
google.com
google.com
They provide hosting for the torrent files and also they are running trackers for the torrent files. The torrent network is backed by these trackers, this is a key difference between Google and them.
Torrent files in themselves are not illegal. They are simply pointers, its the trackers that are at fault. Trackers facilitate the ability to download illegal content, where torrents and a search engine don't in themselves, they just link to trackers.
On the same note... Go google :) I just find it funny.
So IMHO Trackers are not "at fault".
Either way, the pirate bay trial is a symptom of a bigger disease. I think this helps highlight that.
Google never hosted torrents or trackers, Pirate Bay's entire existence is for hosting torrents and trackers.
A torrent file is basically just a list of pieces, consisting of hashes and filenames and other very basic metadata that is in no way whatsoever copyrightable, and a tracker is just a thing that tells you who to contact to grab those pieces.
The only difference here is that Google sends this all at once in a static HTML file -- a big list of things related to your search, which almost always includes copyrighted content; and Google is worse than TPB, because Google keeps significant copies of copyrighted material server-side, whereas TPB and other torrent sites as a rule keep none.