I mentioned earlier what DejaVu has achieved as a project (instead of a critical analysis). As far as I know, DejaVu is one of the few projects that have been publicly developing fonts, and managed to get them added to a variety of distributions and software packages (see at the end of http://dejavu-fonts.org/wiki/Download ).
Indeed there is the issue with the license; DejaVu is stuck with the license that came with Bitstream Vera, and as far as I know there has been no response from Bitsteram/GNOME to relicense Vera to the OFL.