Turns out the discovery mentioned in a previous post was that of a supernova remnant in our galaxy a mere hundred years or so old.
The Supernova who's official name is G1.9+03 is located right near the galactic centre at a distance from us of about 27,000 lightyears, and is the youngest supernova remnant that has ever been observed in our galaxy.
Very cool stuff. It's a rare opportunity to get some serious observations in on a remnant at such an early stage, and in a place where they can continue for a long long time.
Just noticed Phil Plait at Bad Astronomy has a fantastic rundown already up, so go there and read it!