You should sign up for popular forums using your business name as your username to help build links form them. BoardTracker.com can help you find the most popular forums for your industry. Just enter your top keywords and you'll see which forums are discussing them.
Your business name will then show up on the view profile section of the forum. Try to find the most popular and high-ranking forums you possibly can to do this. That way your profile page will be more likely to show up near the top of the search results.