Quick search in Google brought his up:

List of Best Web 2.0 Sites for Building Link Wheel

I know lots of people hate Google, but it's still a great source to find stuff

Hubpages.com and Hubmesh.com are other similar sites that allow you to submit content to it and also earn money using your Google adsense account.

Whats special about squidoo lense? Iv seen WSO in past where they guarantee to rank squidoo lense,just curious

I read that after the latest google panda updates, squidoo backlinks are not so worthy as they were before the update and they help the website with less link juice? Did anybody else read the same?!?

how about this similarsitesearch.com/alternatives-to/squidoo.com

InfoBarrel