WPMU - site wide tags
I'm running a WPMU site and I'd like the main blog home page (using Church theme) to display posts from sub-blogs. I have Donncha's Site Wide Tags MU plugin installed. I'd like specific (site-wide) categories of posts in the three home page blocks (homepage featured top right, top left, bottom).
I'm unsure whether to use the "tags" blog or the "main" blog option in the site-wide-tags MU plugin.
And I don't know what to add/modify in the theme code to enable the display.