Multiple SMS phones to single Twitter a/c

Hi all,
Apologies if this is a common query but I am new to all this. My company is going on Twitter and we thought all employees (on the road) could tweet by SMS to a single company account.
As you all know, Twitter only allows one mobile to be associated with each account. But there has got to be a way of collecting the various tweets and channeling them into the Twitter feed.
Does anyone know how please?
Thank you - Mark

SMS Relay :wink:

Have all of your phones SMS a specified number which will forward the sms to twitter under it’s own number.