in reply to NLP - natural language regex-collections?
You might like to check out The GATE Project at the University of Sheffield's natural language processing group.
(GATE = General Architecture for Text Engineering)
also resource lists from Statistical NLP at Stanford U., Tokushima U., and the NL Software Registry. You will find lots of links if you spend time searching for the phrase in quotes, "Natural Language Processing". or maybe "Information Extraction". Just searching for NLP or IE will not be so useful.
Incidentally, I don't know if this will help you but if you read the GATE Guide (i.e. the Tao of Gate book), you may find interesting the chapters on the ANNIE information extraction engine and JAPE ("JAPE allows you to recognise regular expressions in annotations on documents"). It likes Java though, if anyone knows about GATE usage with Perl I'm interested in hearing about it.
How about reporting back on how your work goes?