I didn't really think about making it a real child-theme... As far as I get it, it should be possible to draw the main template and functions from the default-bp-theme and still be able to work as a normal wordpress theme. So it would be just a child-theme, when it comes to buddypress (in my imagination, when activating the bp-option in your theme
It's hard to tell "which aspect". BP is a plugin, but works more like a whole framework. So I can't test just "different bp-plugins"... Buddypress relies heavily on the theme with many bp-specific templates and stuff. Without those templates it doesn't work. If you want, download just for fun the latest version from http://www.buddypress.org
and have a look at the bp-themes folder >bp-default.
Now I would have to hack your theme completely and I don't think that it would make sense, because that way I loose almost everything I love about it...
Therefore my thought was to pull the templates by putting a custom child-theme-like css, but it didn't work.
Anyway... it would be great! I think it could work, to release it as a normal theme with a bp-option, but i guess it would be alot of work! Thanks anyway for looking into it