My husband has an iPhone and he told me that there is an application called "Voice Box Dial", its a voice activated dialer, he thinks its either free or cost $0.99 ( since he never pays more than that) at itunes app store. It won't help with texting but it will help with phone dialing, so it will help a bit. It just takes the initial set up time for all your frequently dialed numbers.
Also there are stylus that are iphone specific , that may help too.
Best of luck,
Cat (Catherine Somerville on FB)
My 35 yo daughter is newly dx 8/19/10 (had 12 symptoms)
Dx with Type A CCSVI- 1 IJV & double "candy wrapper" appearance of her Azygos
Venoplasty done Sept 21, 2010
Doing extremely well-