wrote a small subset of ruby parser a while back using pyggy,
however couldn't wrap my head around grammar writing so after
a few days struggling with getting unary minus parsing worky
i eventually gave in and went back to using the builtin parser :P
(which i'll eventually need to replace, as this uses c and i need
pure ruby, but thats a ways off luckily :))
so, thusly, this page has my now up for adoption ruby parser
if anyone with mad crazy grammar skills wishes to fix the
b0rkeness, please, feel free ;)
http://www.lypanov.net/xml/development/wubyparsar
greetings,
Alex