An untapped area is question and answers websites. Well kinda untapped. Forums... article marketing... forum profiles..directory submissions.. blog comments are the usual seo people do for new and old sites. But i want to make sure you are all using question and answer websites. The reason being... - Content is relevant to the backlinks - High page rank sites - Lots of traffic - People using question and answers websites can't find their answers on google - Once your link is on the site it lasts and brings a constant flow of traffic http://www.answers.com/ PR7 http://answers.yahoo.com/ PR7 http://wiki.answers.com/ PR6 http://www.allexperts.com/ PR6 http://www.answerbag.com/ PR6 http://www.fluther.com/ PR6 http://aolanswers.com/ PR6 http://www.askpedia.com/ PR4 http://www.blurtit.com/ PR4 http://www.xoin.org PR1 These are question and answer websites i found that are general niches... So there should be something for everybody to get you all started! A good bet would be to search a question.. and see if it ranks high in google... try answer it.. and your link will be ranked high! I have got best results from blurtit and yahoo answers.