Sculpting Mask ?

Need to scuplt on my mesh and some areas I don’t want to draw on, how do i mask parts of of the model so i can’t draw on them.
Best way to explain is have you ever used zbrush, its got the abitly to mask areas.

There is masking yet. A video showing masking was posted on vimeo so should be ported into blender 2.5 when it is more stable.

Thats a shame guess we all just have to wait.
Any idea how untill blender 2.5 is fully stable ?, the website shows the white bar is almost full.

Hi! Any notice?