Help! I need some ideas for machine learning projects.

I am a grad student that needs to submit a proposal for my master's thesis in less than a month. I am out of ideas for projects after repeatedly getting shot down. Does anyone have any possible ideas for projects (and what data sets would go well with the idea)?

I will have at least six months to work on the actual project, very little funding / outside resources, and already have knowledge of most of the commonly used algorithms.