Do you use PostgreSQL PL/Perl?

I'm at PGDay Europe 2010 (http://2010.pgday.eu/)

On Tuesday morning (that's tomorrow as I write this) I'm giving a talk
called "PL/Perl - New features in 9.0".

It would be a great help to me if I could get a better idea of how other
people use PostgreSQL PL/Perl.

What kinds of things do you use PL/Perl in the server for?
How much PL/Perl code do you have (approximate number of functions and lines)?
What kinds of CPAN modules would you like to use in PL/Perl?

Thanks!

Tim.