Question about integration

I basically want to divide my site into "official blogs" and "user blogs". This is done by using and where the official blogs will be under .com and user blogs under .me

Since there are only 4-6 official blogs, I can use Domain Mapping.

Where I'm a bit confused is the and sites. For the home pages, I would like to pull content from both the official blogs on the main section and buddy press on the sidebar.

The Main section would have the latest articles pulled up form the 4-6 official blogs while the sidebar can show new members, status updates, blogs etc. from the user blogs.

How do I go about doing this?.