It's surprisingly easy to write a web browser in Perl using Webkit - and to use the same "browser" to convert HTML-based slides to PDF
Rakudo Perl looks cooler every time I hear about it (but I still haven't tried it for real)
Airports make for better programming metaphors than animals.
People do come up with the most crazy templating horrors
I also gave a talk, or rather a rant on why I hate logging.
Besides talking about Perl, we also had lot's of nice food & drinks (Club Mate!), about a ton of sweets provided by lichtkind, a nice class-trip like trip by train to Bratislava and back, and a Vienna.pm General Assembly.
Oh, one more thing: During the train ride to Bratislava we discovered that from 9 Perl hackers on the train, 7 (or 6?) are regular and/or hardcore cyclists. I know that a few other Perl people are into cycling, but I'm still not sure if that was just a weird Viennese coincidence or a global trend...