Slashdigg and Diggdot.us are two sites I came across recently that combine news from the three most popular sources out there: Slashdot, Digg and del.icio.us
Diggdot.us combines news from Digg, Slashdot and del.icio.us into a unified format Also it claims to eliminate dupes and add some extra niceities.
The other site Slashdigg aggregates news form Slashdot and Digg and provides various viewing options such as side by side, frames, and combined and also has a 'Super Nerd News' section that combines news from sources such as news.com, wired, cnet.
From what I see of their interface, I think Slashdigg makes use of the Lilina Aggregator.
Diggdot.us Slashdigg Lilina