Phoneticise.com
What is this?
This is an online utility that will phoneticise any text that you enter in the above box
What does that mean?
It means that you get a list of letters in the NATO phonetic alphabet (also known as the international radiotelephony spelling alphabet), and names of any other symbols/characters that aren't in that.
What can I use it for?
It is useful for spelling out words and phrases to people to prevent mis-spelling, especially over the phone.
Programming
There should be a programming library (in .NET) and possibly a web service (SOAP) available for you to use soon so you can integrate this into your own programs/websites