Want to keep up with the latest start-ups or have an idea for one of your own? Killer Startups does just that. They review 15+ per day and you can vote if you think it is a dynamite idea. Categories include e-Commerce, blogging/widgets and social networking. If you are a start-up, you can apply and may get a heads up on their site. We don’t know if it will help your hits, but it will certainly help you feel proactive.