(Slightly outdated, check README.linux.console)
the VGA font uses a different encoding then the other ones, and will therefore not display graphic and national characters when run with TERM=xterm. It is best suited to dos(1) and also work somewhat with TERM=linux. Note that the inclusion of this font is experimental.
other fonts but the ones included appear not to be usable for terminal applications. This is not that much due to their variable pitch (which i'd implemented experimentally), but because they miss the graphical subset. Try xfd(1x) to check this.
In general a proper font family for terminals seems to be missing at all. If you know about a scalable terminal font family, please drop me a line.