BuddyPress.org

I think this is a good idea.. Now that I know that you are working on this, this is what I’m going to do on my site

1: Let users fill in their external rss feed adress (which then gets feed into FeedWordPress like you said)

2: Create a default blog theme which matches with my site layout

Now you have a seemlessy integrated blog which also imports external posts.. sweet!

Keep us updated!