Samson WP Plugin includes a few dozen .GOV sites as well as some .EDU sites. It then takes those URLs and submits them to your Linklicious account. After that, it submits the same RSS feed to Pingler.com for Pinging. It also submits the feed to your OnlyWire account.
AND Samson WordPress Plugin shortens the RSS feed via Bit.ly so that you can easily share it on Twitter, Facebook and Google+ Plus.