The application will be simple: the user will draw (using color, width, and opacity), and then be able to send to a friend via facebook or email. There will also be a way to view Graffiti the user has sent/received, and ideally a way to replay the drawing like we have on Facebook Graffiti. We can handle most of the design but don't have any experience making iphone apps. It will most likely be a free application and we're going to promote it heavily from Facebook Graffiti.
Should be a fun project. If you're interested, shoot me an email at hn.jobs.tmt [at] gmail.com with your resume and links to any iphone apps you've built, plus your rates.