BuddyPress.org

yes, all of this seems right.

I use the WP 3.0.1
and add
define( ‘MULTISITE’, true );
define( ‘SUBDOMAIN_INSTALL’, true );
$base = ‘/’;
define( ‘DOMAIN_CURRENT_SITE’, ‘usenode.com’ );
define( ‘PATH_CURRENT_SITE’, ‘/’ );
define( ‘SITE_ID_CURRENT_SITE’, 1 );
define( ‘BLOG_ID_CURRENT_SITE’, 1 );

also DNS wild card entry allowed.

Now, I signup , only the user was created, no new blog create, even I input the blog ‘s sub-domain.

But, when I remove the buddypress, use the default theme of WP 3.0.1, it works, I can create the use with new blog.