I suggest you to develop a very useful system. The goal of this system will be to answer to question such as “I am a student in … and want an idea of a graduation project in the field of ...”.
The system will use a database containing worlds related to the field, such as “database, factory method, concurrent, web server, Sylverlight, Linux, webcam, speech recognition, ASP.NET ...”.
It will randomly select 5 of these items and Google them. Then it will analyze the results and determine if some interesting idea come out of it.