I came across this the other day and I though that someone might find it
useful. It's a piece of software called gammu which allows you to
(amongst other things) send and receive SMS messages using a mobile
broadband dongle like the like the Huawei ones that 3 sell. It's run
from the command line and there is a good page about it here:
I can see two uses for this:
1. When you sign up with 3 to top up a mobile broadband account via
credit/debit card, they send you a text with a confirmation code which
you need to enter on their website. With gammu, you don't need the
Windows software to read the text.
2. System monitoring independent of a wired internet connection. Your
web server's lost it's internet connection? Have it send you a text to
tell you about it.
Admittedly, I don't do systems admin work, so the second suggestion
might not be particularly useful, but hopefully this will be of use to