Disclaimers aside, I bookmark utilities like this one for a number of reasons, one being my inability recall where it was that I wrote down my WEP key. (I've long since given up on actually remember the passphrase itself!)

A more recent application occurred during a hotel stay during which the hotel locked down it's internet access using a passphrase due to a "malicious user", and I needed access before the phrase was distributed to the front desk IT person.

As you can see, there are a fair number of legitimate uses out there, and this little app takes up very little hard drive real estate. I actually have a USB drive with "travel"-related software utilities such as this, which has saved my quite a few times.