anywho, the FAQ regarding interests has lost the link to the guide
General information on LiveJournal interests can be found the Guide to Interests (http://www.livejournal.com/guide/interests.bml).
and the bit about findsim, until it is re-enabled
Users with Paid or Permanent Accounts also have the ability to search for journals based on similarity of interest (the number of interests in common with a particular user) at http://www.livejournal.com/interests.bml?mode=findsim .
For future reference, findsim will have an entry box on /interests.bml itself; there is no more ?mode=findsim. But for the time being, it's disabled.
So those bits are out of the FAQs.