Re: Theme reference guide for 1.1?
See the codex, https://codex.buddypress.org/.
Best way to learn theme tags right now is just downloading a few buddypress themes and look at the source. Those on member blogs (if thats what you mean) applies to wpmu and has nothing to do with buddypress.
Use this site (http://wpseek.com/browse/) to look at all wordpress and wpmu functions.