Blog Promotion: Who are you pinging?

This weekend I'll be perticipating on a panel about blog promotion at WordCamp Charlotte, we're going to have conversations on differnet ways to increase your blog readership and using social media to build an audience to get your blog infront of the readers you want to stick.

For some pinging may be old school in the blogosphere but it's still needed, so I thought why not post a list of urls that I ping. Not included on the list are pinging sites such as http://pingoat.com.

What pinging services do you use?

What sites do you use to ping that's not on the list?

The List [...]