Oh, oh, also, a big one:
You can enable Bake-on-mesh functionality on any mod object or link yourself(!). Even prims and sculpts.
1) Edit it, either the entire object, link or just an individual face/layer.
2) Go to the textures tab
3) Click the diffuse texture
4) On the texture picker dialog, choose the new 'bake' option
5) Pick your bake type (head, upper, lower, any of the clothes layers..)
=> The object or individual faces of the object automagically get the bake when it's attached.
So handy for certain attachments!
P.s. Again. LL. Why no materials on the system skins now? Why? WHY?