I dont think just the brush can be. I know you can rotate and skew the canvas around at different angles, so I guess you can get the brush in different angles, you would just have to rotate the canvas at the angle you want. Maybe someone should e-mail Adobe and have them add that feature to CS3(or whatever the new one will be called.)
you can rotate the brush. select the brush then go into the brush set up menu then "brush tip shape" and rotate the arrow to change it.
Dammit, Jash got it before me. <.< You can always make a new layer, brush it, and rotate it... but that's the long way.
i dont find brushes set up, i know where is set up for healing brush tool but for brushes not, pls some1 help ;(