VoxForge
It might be interesting for Voxforge users that Kaldi project has made availalbe a Librispeech corpus of 1000 hours segmented from Librivox books.
This corpus provides a good foundation for open source speech recognition and should fulfill the needs from researchers.
The license is pretty permissive, it even might have sense to include Librispeech into Voxforge distribution.
--- (Edited on 10/6/2014 21:14 [GMT+0400] by nsh) ---