Six months ago, I started over, in Perl. I've implemented most of the parsing, though I haven't written much of the grammar, and I'm working on the basics of the generator.
As far as others using perl in this area, there are two places to check. The first is fieldmethods.net, a /. type site (minus the trolls) for linguistics. Do a search for perl and you'll come up with a dozen articles, two of which are on the front page right now.
The second is comp.ai.nat-lang. A search there turns up some articles. You might also check comp.perl.ai.