Geweb

<p>Use this plugin if you want allow users create their own sites based on your.</p>
<h3>Arbitrary section</h3>
<p>You can create your own HTML code of the form.<br />
Create file in your theme, put code from plugins/wp-auto-mu/geweb-mu/register.php to your new file and add_filter geweb-mu-register-path to rewrite file paht for the form.</p>


WPMU User own site

Plugin allows to create site on user registration in WPMU environment.

artilibere

<p>Network Blog Manager aspire to be the perfect companion of every Super Administrator of a WP Blog’s Network.</p>
<p>With Network Blog Manager you can find easily every blog in your network due an internal search engine.<br />
Then you can contact the administrator and have a quick overlook of the number of contents (posts, pages, comments) each blog has.</p>
<p>Extensible with an internal plugin support: you can build your own functionality!</p>
<h3>Features</h3>
<p>Briefly:</p>
<ul>
<li>Ideal companion for Super Admin </li>
<li>Internal Search Engine for Blog’s Networks</li>
<li>Quick Overlook of Multisite’s Instances</li>
<li>Useful SEO Stats: Google and Alexa Ranks, Sites linking in, Average Load Time, Yahoo! Site Links</li>
</ul>


Network Blog Manager

A simple but powerful blog manager to be used in blog networks. Include an internal search engine, statistics, and some useful tool.

WPMU User own site vs Network Blog Manager