A colleague of mine, Dan Shane, suggested to me today a good topic to post on my site would be bluetooth hearing aids.
A quick Google around shows that someone beat him too the idea first for example

There’s also a walk through of how to make your own: http://gfern.com/btha/btha.html

It’s certainly a great idea. If/when I lose my hearing and have to have a hearing aid then why not make it a bluetooth one that I can connect to my iphone, ipod, tv and any other audio devices that I have in the house so that I can just have the sound straight into my ear rather than making them loud enough for the hearing aid to pick up and amplify.