DeannaS

kgraeme

This plugin allows site admins to turn on and off the following widgets on the WPMU dashboard (for all users):
<ol>
<li>Primary Feed</li>
<li>Secondary Feed</li>
<li>Incoming Links</li>
<li>Recent Comments</li>
<li>Recent Drafts</li>
<li>Plugins</li>
<li>Quick Press</li>
<li>Right Now</li>
</ol>
In addition, site admins can override the primary and secondary feeds.

WPMU Simple Dashboard

This plugin lets site admins control which features are shown by default on all user's dashboards.

isikom

Category Text add a widget that allow to add arbitrary text or HTML code, different for each category of your blog. 
It’s very usefull for SEO, because you can make different text for different category, so also different banner etc. 
Now you can select also the home page position.
The plugin born from idea of <a href="http://www.rossozingone.it" title="web agency" rel="nofollow ugc">Vanny Rosso</a> for his blog <a href="http://www.fantagiochi.it" title="on line games" rel="nofollow ugc">Fantagiochi</a>

Category Text

category text allows you easily to add a widget for a Category Text-Box.

WPMU Simple Dashboard vs Category Text