StumbleUpon is my favorite social marker.

i think squidoo is good if you are an affiliate marketer. if you have favroite books that and like to write great how to articles, you can make an extra income with their site. as far as generate long term business i don't think it will do unless you are an author selling a book.

Best I've seen so far from squidoo is a PR1 on a page that's not their own.

Not that a PR1 isn't important, it would take a PR0 right off the bottom.

A more useful link or page would be a post on a forum that allows your URL in the signature. It has to be a popular enough forum to have solid pages cached with responses to them. There are plenty.

Squidoo lens is not bad, been doing this for a long time and I could say that they actually bring me traffic.

Squidoo is good site help you in improving value of your site search engine if when creating a lens you put unique quality content with link coming from it on your keyword to your targeted website

Squidoo is, to this day, a very good source of traffic and links.

You need to put the uniques content otherwise squidoo will not approve your lens. Your lens should be interesting enough so that everybody take a look to your lens.

Whether you want to get your new lens off to a good start or just want to find out why one of your favorite lenses isn't doing so well in the search engines today, we've got ten great tips to help you out.