So I was installing SABnzbd on my new windows 7 install and when it came to the site question with newzbin and nzbmatrix I decided to see what the site looked and it appears revived and to be functioning in its full piracy glory and I have some credits still.
Yeah it was back within days of being shutdown.
They are certainly not as fast or as thorough as before tho. I have been using nzbs.org to grab new releases because a lot of the time newzbin is a day or two behind in indexing them.