The new contest created by Blackhatworld forum bring my attention to the top players in the SERPs for keyword 'Blackhatworld rocks '.
Not surprisingly , only after the few days in the top are social sites, well established domains.
There are a lot of forum posts, and digg, but at the very top are:
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hubpages.com
squidoo.com
xomba.com
freewebs.com
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These are the Websites where you can create one of few social pages for free, and use them for marketing your products.
You can put your own ads on the pages, also the links to your places, and information of your products.
The pages have to be useful to the site community, also they have inner ranking systems to prevent from spammy pages.

Taking the squidoo for example - the page created there is called a 'lens' , now the created recently lens ranks very high for new
keyphrase by itself, it can also bring some future traffic to the places it promotes.
BTW. I've found the interesting post explaining increasing web traffic with squidoo lens that points out the importance of proper tag using.
The squidoo lens is now ranked very high, I wonder if with the time will slowly sink down, like the blog posts, that usually have some 'expiration period'.