Sharing SNG files is great, but being able to save the MIDI parts and revise them would go much further in creating BB content.
This was internally discussed, and the general consensus was that only through the use of Manager Software the team will be able to provide everyone with a convenient and complete song and beats editor for the BeatBuddy.
Unfortunately, we are not quite at that point currently, but the team is making enormous efforts to reach that goal ASAP.