Allison Randal, Parrot architect, gave a talk about Parrot at linux.conf.au 2008:
From their website:
Parrot is a virtual machine like no other. Targeting dynamic languages such as Python, Ruby, PHP and Perl, it incorporates an object-oriented assembly language, is register-based rather than stack-based, and employs continuations as the core means of flow control. It hosts a powerful suite of compiler tools tailored to dynamic languages and a next generation regular expression engine. This talk introduces Parrot through the eyes of the Python-on-Parrot implementation (nicknamed "Pynie").
No slides available, but you can download the OGG here (81MB)