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 building backlinks (links to your website from other sites on the 'net) all at one time. (And backlinks are a critical component of how your site ranks in the search engines.)
How do you do this? Post on forums in your niche. Comment on blogs in your niche. Post good, valuable content that makes you sound like a leader in your industry and earns you a reputation among your peers and the type of people who would be your future/prospective clients. Don't shamelessly plug your site, but use forum signatures where they're available, and let others know that you have this site.
Do this a little every day. Be consistent. After a couple of months, you'll have a positive reputation (and so will your company) for knowing your stuff and being friendly and helpful, you'll have links from other sites in the industry pointing to your website (which helps your search engine ranking), and you might even end up with a few clients outta it.