BuddyPress only works on one blog, blog id 1. You need to create pages that will show directories for each BP component on that blog. You do not need to create these pages on every blog. BP will register content created on other blogs in your MU install and add posts to the activity stream.
This is a known issue with BP menus. We are working on solutions for better menu managment. The community is working on BP 1.7
This version will allow better integration into any WP theme. The menus are getting changed to vertical menus to better fit multiple menu items more efficiently.
I’m also working on a solution to use the admin menu system to manage user menus. There isn’t much you can do at this point aside from removing items
`Hook to WordPress
After your function is defined, the next step is to “hook” or register it with WordPress. To do this, call add_action() in the global execution space of your plugin file:
hook_name
The name of an action hook provided by WordPress, that tells what event your function should be associated with.
your_function_name
The name of the function that you want to be executed following the event specified by hook_name. This can be a standard php function, a function present in the WordPress core, or a function defined by you in the plugin file (such as ’email_friends’ defined above).
priority
An optional integer argument that can be used to specify the order in which the functions associated with a particular action are executed (default: 10). Lower numbers correspond with earlier execution, and functions with the same priority are executed in the order in which they were added to the action.
accepted_args
An optional integer argument defining how many arguments your function can accept (default 1), useful because some hooks can pass more than one argument to your function. This parameter is new in release 1.5.1.`
