That's interesting... just saw on shacknews that id Software was Acquired by Bethesda Owner ZeniMax. This worries me a little, mostly just because I've never heard of the acquiring studio. However, they seem to be saying "it's fine, it's all fine, everything'll stay the same..." Who in the tech industry hasn't heard that before? Course, time will tell....
Some more details from The Carmack here.
Acquiring studio was responsible for the Fallout series (which I admittedly haven't played, but has pretty good reviews) and the reigning sentiment seems to be that iD will be ok...
Granted, iD has been outshone by Valve for quite some time now, so I don't think there's a lot of damage you can do at this point.