As a person without any disabilities, I find the iPhone an invaluable tool in helping to keep me organized, happy and informed. Recently, James Nuttall posted to his blog what his iPhone is worth to him and it was an amazing $8700!!!
James, who has a vision impairment, shares all the equipment he has owned, or uses on a regular basis that he can replace with an iPhone and apps. It's truly an amazing list. Read the full post on his blog - My iPhone is worth $8700.