Pinging your website is a good way to get the search engines aware of it. After you add a bunch of content, you should do a ping for maximum search engine visibility. There are services that will do it automatically for you, and ones that are manual. Here are some that are free.
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My Page Rank
Submits to a whole slew of search engines.
Pingler.com
PingMyBlog.com
PingMyBlog.com is a service which does the hard work for you. We notify all the major blog directories in one go so that everyone knows about your latest blogs.
AutoPinger.com
You sign up for an account and sit back and relax. It’s all automatic.
FeedShark
Feed Shark is a free online tool that easily promotes your blog or website – with the simple push of a button! Feed Shark pings a variety of services to notify the world that your blog, website, RSS feed, or podcast has recently been updated or created! It takes less than a minute to use Feed Shark and saves you countless hours of time in the process! Enjoy our service and have fun!
PinGoat.com
Pingoat is a service that pings or notifies a number of services that keep track of weblogs and publish them. By pinging, you let the services know that your blog has been updated and hence, they crawl and index your site, publishing your blog contents, thus increasing your blog’s popularity.
Ping-o-Matic
Squidoo Pinging
You got a Squidoo page? You should ping it too. Don’t leave it cold and in the dark.