Last week Google released details of a new audio interface it is working on to improve accessibility. They say "An adaptive interface with tactile and audio feedback could make it easier to ignore a small screen". See the full article at:
We think this is a great step to improve accessibility on a range of devices - and can be used for people with sight impairment but also just for when you are on the move.
One mobile banking app already being used today has this capability - while you can read the tiny type off the very small screen, you can also have it read out the balances and transactions as you go.
Bankstown City Credit Union was the first financial institution with this functionality - see http://www.bccu.com.au/access-services/mobile-internet-banking.asp
What are you doing to improve accessibility in your applications?