Microsoft now has a business directory designed for small businesses. You can submit your site for $49 per year.
A listing includes:
– One main directory listing that includes up to 4 links to your web site
– Placement of your listing in up to 3 relevant directory categories
– An optional business card (simple web page) that lists your business contact information, description, and up to 8 additional links that allow your to promote your products and services