The WP-Tube for YouTube plugin can automaticaly import your Youtube videos including their description, keywords and attributes right into your blog stream. It uses the Youtube, GData API to get the videos and you can customize it specifying which Youtube username to use and how often to ‘ping’ the Youtube API to check for new videos as well as setting the size and color of the Youtube player.
Comming soon… 
Custom template for layout as well as support for custom YouTube players such as ‘Youtube with style’

WP-Tube

Automaticaly import your YouTube videos into your Wordpress blog as posts

Thomas Hoefter

The Onlywire multi autosubmitter is a free WordPress social bookmarking plugin. It can be installed easily on all WordPress weblogs and allows you to submit all your posts to many different social bookmarking and networking websites, including Digg, Reddit, delicious and Mixx, through the Onlywire social bookmarking service automatically.
Requiremments:
<ul>
<li>PHP5</li>
<li>cURL</li>
</ul>
Demo Weblog: http://demo.lunaticstudios.com/
Plugin Homepage: http://lunaticstudios.com/software/wp-onlywire-multisubmit/

Onlywire Multi Autosubmitter

Automatically adds your post to social bookmarking websites using the Onlywire.com service.

WP-Tube vs Onlywire Multi Autosubmitter