New stencil: curly braces, cloud shapes, block arrows
 

I have imported a few shapes from Visio into OmniGraffle and created a
stencil of them.
It contains a curly brace, a number of cloud shapes,
and a number of block arrows.

You can download the stencil at
[url]http://zach.in.tu-clausthal.de/software/index.html#graffle_basic_shapes[/url]

They are not perfect (especially the curly brace), but better than nothing.

HTH,
Gabriel.