Google Developers Group
If you have some idea for an app that can help the homeless, you should definitely participate in the Project REACH Mobile App Challenge
The Project Reach Mobile App Challenge will award a total of $75,000 to five (5) developers with technology that help to find easy access to a bed, meal, or medical services in real time.
Learn more http://reachthehomeless.challenge.gov/
I am not sure if I will have time to take on this contest, but I would like to PARTNER with some Chicago entrepreneurs that would come up with a good idea and drive it. I could co-sponsor the development cost and provide development resources.