Yes, it's still being used, but nowadays usually not as monotherapy, and in smaller doses than in the Concorde study. The main finding of the Concorde study was, that they could find no benefit in taking the drug before the symptoms appear, ie. the progression to advanced disease wasn't affected.
I wouldn't call the difference in death rate (176/171) statistically higher (bad luck?). After all that was just one study, there are others that contradict. Here's a couple of sites on AZT safety: a WHO study, NIAID site and AEGiS.  18:22, Jul 27, 2004 (UTC)