BuddyPress.org

Your users’ blogs will get whatever template you have set as “default”, which is probably the BuddyPress Home Theme. So do this:

1) Rename the BuddyPress Home Theme something other than “default”.

2) In the dashboard for your main blog (admin), assign the BuddyPress theme to your blog. That’s what users will see when they visit your site, as your “blog” is the site.

3) Choose the theme you want your users to have as their default blog theme.

4) Name your chosen default blog theme “default”.

If you need additional info, let me know.

Mark