what would be a good project that windows/web based and is business related?

ok i have a group project to do that is windows and web based and is business related which provides value. for example, creating a program for your pocket pc to find prices off of www.amazon.com for books to compare at retail stores and being able to get discount by showing them the prices. something along those lines.. any cool projects you guys can come up with that can be fun to create based on that criteria?? thanks