Hide sidebar when in the buddypress area

hey gang. i think the site's coming along nicely. i just decided to experiment with adding buddypress too with my marketpress site. so far, so good.

my only question, so far, is whether its posible to hide the Gridmarket sidebar when in the "community" or buddypress section of the site. its pretty big and takes up a lot of room when in buddypress.

any direction on this? thanks