I set up a directory of all the competing products in my industry. (http://www.slingdirectory.com
It used to be on my site and have a PR of 4, but since I sell products in the industry, I moved it to its own separate site & server.
Any company in the industry may add their site. Customers rate each product and the products can be sorted by ratings. Also, the highest rated company each month is featured on the homepage.
Each company is given html code for a graphic "Rate Me" link that shows their ratings and allows customers to add their rating.
I thought that these graphic links would count as backlinks in Google, and thus increase the PR of the site, but Google isn't acknowledging them at all. I even changed the dynamic page titles to be more search-engine friendly, but that hasn't helped either.
I'm looking to increase PR and get higher rankings in the search engines, mostly Google.
No one has been able to figure this one out, from my SEO contact to my site coder, which is the reason for the high point value.