WordPress MU

Is there a way with 3.0 to aggregate posts from sub-sites onto the main site without using syndication? I don't want to use syndication because it results in duplicates of the posts being copies to the main blog. Basically, I want to display the latest post from each sub-site on the main site's page.

If not, are there any functions that I could use to write a plugin to do this?

Best bet would be to ask here as this is where 3.0 discussion is being kept:

http://wordpress.org/support/forum/12