Right now I'm working on a natural language task management system. Basically you enter something like "12 page paper in project hist201, due apr 23 est. 8h high priority" and it understands what the hell you're trying to say: project, deadline, estimated time, priority. It also checks similar tasks (using naive Bayesian classifiers) and gets you a probability distribution of velocities (estimated / actual / relevance for a word), and supposedly, but I am still working on it, will show you a probability of finishing it on time given past history of similar workload.

The goal is to be able to either Tweet your new tasks, add them in bulk (several lines), or even do something like "http://taskulus.com/12 page paper in project hist201 due apr 23 est 8h high priority" and then receive a lot of analysis.