Thanks for replying Fiery.
I did briefly try using an old Ipod touch but couldn't connect to the IP address.
Ideally I would like a display big enough to show a number of sensors at the same time, that's why the photo frame option seems an ideal solution.
I would love to purchase a Samsung 800P but they seem impossible to track down in the UK.
I'll keep looking.
Final question, I was considering a Yocto Display, as an alternative. Have you tested these displays and is it possible to have multiple pages as I'm not sure how much data could be displayed on the small screens?