Submit It - the long
reigning champ of search engine submissions. Free service but will charge
for premium service.
Refer-It - banner exchange
program that pays a commission for traffic brought to it
ClickZ - resource for online
business with hundreds of articles on ad management, banner
campaigns, banner design, branding, creative content, direct
marketing, and more.
SelfPromotion.com -
automatic search engine submission. Include tips on getting listed
on Yahoo!
Web Marketing Today -
marketing advice with emphasis on e-commerce. Also, links to 2,500+ articles
on self-promotion and related topics.
WebPromote - site for
permission-marketing software and service but also has some
freebies.