Re: Forums in v1.1
If you are not providing users direct access to your bbPress forums, then you can delete your bbPress files, if you are then leave them alone. You do not need the buddypress-enable.php file anymore.
I can’t speak for plugins, but if the forums in question are attached to private groups then they will not show up. They will remain hidden in the new directory when accessed through BuddyPress.
If you are not running a highly customized bbPress install, definitely consider using the new forums directory instead of a separate bbPress setup. The integration is seamless and requires no messing with cookies, integration settings/plugins.