There are many things that we would like to improve in VLC, but that we don't, because we simply don't have enough time. That's why we are currently looking for some help.
We have identified several small projects that prospective developers could work on. Knowledge of C and/or C++ programming will certainly be useful, but you don't need to be an expert, nor a video expert. Existing VLC developers will be able to help you on these projects.
You can find the list and some instructions at http://wiki.videolan.org/Mini_Projects.
Don't hesitate to join us on IRC on the mailing-lists.
We are waiting for you!