Glibc 2.12 was released in May 2010. Seriously, this is ridiculous. We'll try to make future releases completely independent of glibc, but that will require additional work.
EDIT: Ridiculous might be a strong word given that it is supposed to be enterprise distribution, but still.
Indeed, it is not only a strong word but I'd argue simply inaccurate; it is entirely appropriate given the release type.
That said, CentOS is one of the more popular linux distributions for non-debian based systems, so I would suggest it is probably a good idea to allow for the AirVideoHD server to be run independently of the glibc version as you say (regardless of my personal use of the platform and obvious desire to run the server myself - I've been waiting well over a year at this point already so I'm happy continuing to wait).