It works with the paintbrush but does not seem to work with calligraphic brushes or raster brushes certain type s of brushes wont work. You can give the path a stroke using the stroke panel and that should work fine.
If you need i will do a video and ost it.
Jason, to do this, select the stroke you made with the Paintbrush Tool, then use the brush pulldown menu above to change the brush to "Basic". This will allow you to edit the width of the stroke.
Unfortunately, you'll have to do this manually for each paintbrush stroke you want to edit the width of, which can be a little tedious. Wish I knew of a way to make all paintbrush tool strokes appear automatically as "Basic" strokes by default!
Wade and Josh,
Thanks for helping clarify my moment of percieved insanity.
I am thankful I have not lost my mind (at least today)!