I've put together a list of newbie quantlib projects at
http://wiki.quantlib.org/twiki/bin/view/Quantlib/NewbieProjectsThe one I'm particularly interested in having someone do is to finish up the
GARCH model that is in CVS. The basic structure of the classes is there, and
all someone needs to do is to use Hull and formulate the equations there into
something that fits with the optimization infrastructure.