I don’t see why phones don’t just have a function built into them yet which allows you to project the image somewhere else, but until that day comes, there is Project-a-Phone. The company has previously released an underwhelming 640×480 pixel contraption called the ICD-3000. They believe the demand for the product was high, so they’ve released their ICD-5000, with a 5.17 megapixel lens that can take screen shots with resolutions of up to 3.15 megapixels. I have and will never have a use for something like this, but if you want one, you can pick it up at Project-a-Phone’s website for $395.
Project-a-Phone announces overhead projector for the cellphone [TG Daily]