Squidoo is a new.. .interesting concept.
Here's some information from their FAQ –
1. WHAT'S A LENS?
A lens is one person's (lensmaster's) view on a topic he cares about. More specifically, a lens is a single web page filled with information and links that point to other web pages, to continually updated RSS feeds, or to relevant advertising. It's a place to start, not finish.
It appears this will be growing pretty quickly. You can add multiple lenses about any topics you are interested in. And, they'll help you grow traffic or to establish your expertise.
So, go squidoo and check it out. Also, it looks like there will be monetization options in the near future with their business model. It's free to join and they say it always will be.
I hope you enjoy it!