I would like to "omit" certain blogs from the regular BuddyPress blog loop. Either by blog ID or blog Name is fine. Has anyone had success doing this?
Currently the bp_has_blogs() loop does not allow an exclude param to remove certain blogs from the listing. By default all public blogs are listed. You can try a simple hack (but the pagination will be off) http://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/excluding-certain-blogs-from-bp_has_blogs-function-for-12/
Or you can filter on bp_has_blogs and loop over the array and unset (+ recount) prior to being displayed in the theme. While not ideal, pagination would be correct.
pseudo code for a filter: (though untested as i do run ms+bp setup - have a look at the source code file bp-blogs/bp-blogs-templatetags.php and the class BP_Blogs_Template for further info)
replace SOME_BLOG_ID_HERE which whatever numerical blog_id
Similar method works to exclude members: