While I'm not a Squidoo expert, it does work as a backlink builder, but it seems to me on my usage that the quality of the link isn't huge. Squidoo has been google slapped before. While their current PR is 8, i don't think that drives down through other pages very much.

Social Book marking can be a good source of fast indexing, but I have had mixed results.

Mike
Brainloaf, Marketing Automation Software and Services