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hmmm... this is a marketing company?  They need a kick in the pants.  It sounds like as an intern you will be with them for a limited amount of time.  If that is the case then follow the advice given by others. However, the folks at this company really need to go waaaay back to the basics. If I was an intern there I would try to do something else - instead of attempting hatchet surgery on a sow's ear. (This can be risky because you don't know who conceived the original site and what the company thinks of it.... however they must not think much of it if they are willing to turn it over to a stream of interns. Also your comments that the owner of the business thinks that forum spamming is good advertising shows that they don't understand the web.) However, the truth is... this website should go back to the planning stages....  this company needs to determine: the objectives of the website, what they expect visitors to do, learn, buy, contact, etc. when they arrive at the site plan a pathway through the site for each type of visitor that will lead to both visitor and company goals and then storyboard a website that accomplishes both visitor goals and company goals determine how people interested in the services of the company might search for the site determine a cluster of keywords that will market your services in the geographic area that is served plan content for the site that will position it in front of those keywords Should you do this?  Hard to say.  It depends if the company is serious about making a good web presence or if they are satisfied with their current farting around. I don't recommend posting their URL here... would be bad marketing.

I agree with Anthony. Focus on communities, forums and blogs that are highest of quality, in line with your market's interests and yours so you're more inclined to be consistent with your efforts to build links.