Final projects can take many different forms. Here are some representative examples:
Document Expansion (2007; mentor: Vander Linden) - Nathan Beach built a search tool for his ChristNotes website (http://www.christnotes.org/) that addressed term mismatch problems in information retrieval using document expansion. This project was done for honors. Here’s the final report: Beach2007.pdf.
Galapagos (2006; mentor: Frens) - Andy Meneely built a genetic algorithms framework for use in research and education. You can see his system here: http://galapagosga.sourceforge.net. This project involved both software development and experimental design.
Konfidi (2005; mentor: Vander Linden) - David Brondsema and Andrew Schamp built a framework of trust based on a network of authenticated people. You can find the results of their work here: http://www.konfidi.org. This project was done for honors (by one of the partners) and resulting in a research publication (for details, see MTW-2006).
VanAndel Gene Bank (2006; mentors: Bailey, Kyle Furge) - Justin Kent built a web-based bio-information system in collaboration with researchers at the Van Andel Institute. Here's the final report: Kent2006.doc
CAYVAN (2006; mentor: Laverell) - Jason Roelofs worked on an Engineering senior project team to build a media streaming system for the Hekman library. Here's his final report: Roelofs2006.doc and the Engineering team he worked with: Stream Come True.
Use these only as examples; don't let them limit your potential options.