OK, it was my first time. And I loved it.
I had to teach some programmers from ABN Amro Bank how to use Perl. It was a 40h course going from Perl basics to DBI, GD and mod_perl.
My students told me they liked a lot of what they've seen and that Perl was going to help them solving several things that they now use C for.
Unfortunately, they are still tied to MS Windows world, but soon they will be (more) enlightened. They've met Perl and Linux and they've seen their power.
I wished I could be teaching more Perl. I've also learnt some things (as we always do when we teach people) that will make some programs easier.
That's it... A full week.