Search PirateBay / BTJunkie / ISOHunt / Demonoid for Torrents:

N.B. Be aware that each search will open 5 new windows/tabs.
Yes, this script is a quick hackjob.

Changelog
January 31, 2010: Added KickassTorrents.com to the list, as it seems like a good indexer so far.
January 19, 2010: MiniNova.org removed since it only has legal torrents now. Demonoid added. Changed up the styles.