Online Dating Services

There are many online dating services, each with their own pros and cons (comparison here: http://en.wikipedia.org/wiki/Comparison_of_online_dating_websites). www.plentyoffish.com is a free online dating service with 11,000,000 registered users. According to Wikipedia, it's the #1 dating site in the UK and Canada. The difference between Plenty of Fish and other sites like Match.com or eHarmony.com is that the site is completely free. This, of course, has its downsides in that a lot of people on the site may not be very serious/genuine in posting. The advantage, of course, is that the database of people to choose from is huge. The site leverages collective intelligence by allowing anyone to register as a user, and then offers the ability to search for people based on very distinct characteristics.