You can get voice recognition software, but it isn't cheap and it isn't all
that great. I have Dragon Naturally Speaking (visit the Scansoft website)
which cost about ?70. This works fine with Windows, but for real Excel
integration you need the next version up (I think it's the 'Professional'
edition, you'd need to check) which has features specifically designed for
use with spreadsheets.

I said it doesn't work particularly well, but I suppose if the user has no
option other than through voice, it would not take long for the speech
engine to get used to his/her voice and presumably this person is prepared
to accept a relatively slow input process to get results. By this I mean
that voice recognition software will never work as fast as I am able to use
the keyboard, but for somebody who can't use a keyboard it may well work.

Microsoft and others also do their own versions, but the research I did
suggested Naturally Speaking was the best option.

Hope that helps.

Paul C,