Umm ... if you're trying to have multiple accounts and post a question with one and reply with the other including a plug to your site, it only works if you remember to log out and not use the same...

Get lots of inner links from authority sites to inner pages throughout your site ... that spreads PR in a very natural looking way.

Mackone is right as far as getting search engine optimization to work for you. Word of mouth is the best form of marketing that exists on the web ... It gets buzz going about your business while...