With Custom Admin Bar you can provide access to anything on the web from a convenient drop-down menu in the admin bar!
No. This plugins is offered as is at no charge.
The Custom Admin Bar will work with any BuddyPress theme which support the WordPress admin bar. Any theme compatible from BuddyPress 1.5+ should be fine.
We recommend 62 X 24, but as long as the height is under 28px you should be fine.