Update: See Mesh Deformer Changes for an update on mesh clothing.
There are several people that make tutorials for Second Life™. Others explain aspects of Second Life. We can find their stuff in blogs, web sites, on YouTube and Vimeo, and amazingly enough in the SL Forum. Of all those the stuff in the forum seems to be the hardest to find. So, here are a couple of the forum jewels.
In modeling mesh that moves, avatars and clothes, the arrangement of the vertices and how they form loops of quadrilateral polygons is an important concept to understand. Arranging them well determines how well the model can flex. The arrangement of vertices and faces is referred to as the model’s topology.

Codewarrior Congrejo has a couple of good tutorials in the SL Forum. I think both are too good to just be buried in the forum. They will get little love from Bing & Google. Quickly they will scroll out of sight on the forum. So, I’m putting links here on my blog.
