Hackontest is a 24 hour programming competition between teams of three open source software projects. The event takes place at OpenExpo on September 24/25, 2008 in Zurich, Switzerland. Winners get some prizes too

Inkscape is likely to take part, at least one of the developers (and former GSoC student) agreed to take part.
What is needed:
1. More ideas.
2. More programmers

Here is
Inkscape's page on Hackontest page