Nucleus CMS It supports multple blogs on a single install. Which for me is a big plus since I have several I actually use on a regular basis.

But my main questions are how easy is it to theme? Did you like it? And how buggy did you find it?

It's pretty easy to skin. Just create your normal html template, then insert their template tags i.e.:

<h2><%date%>: <a href="<%itemlink%>"><%title(raw)%></a></h2>
<div class="body">
  <%body%>
</div>

They have the full list of tags and template/skin parts on their Docs site. You could also download some existing skins and dissect them...or demo the Admin panel at Open Source CMS

it's basically like templating in MT then...

Exactly.

Okay, well not exactly like MT...but pretty much, if you know how to design for MT, you can do Nucleus (Expression Engine, too).

ty muchyly