Re: BuddyPress and Multi-Site issues
Hi.
I wrote a simple plugin that enables BuddyPress to work with MultiSite. Unfortunately, it requires few changes in BuddyPress core files (adding some actions). Maybe BuddyPress authors will consider adding this actions in some of the future releases.
The easiest way to have one BuddyPress instance but separate BuddyPress networks on different domains is to create a new set of tables for each site. I not very happy with this solution, but as WPMU creates new sets of tables for each blog, I guess it will be OK to have few sets of BuddyPress tables for each domain (site). And this could improve performance because tables will be smaller and interaction between them is not needed.
If anyone is interested in BuddyPress working with MultiSite, please contact me.