Awhile back I posted my Dspeech Cipher Machine created originally to make a fake language (though not really a language) to vex my D&D players.
I realize that working through a word for word cipher on your own is somewhat brutal, so I made an online tool to help make the process a bit better:
It lets you input a bunch of ciphered text and then takes you to a page where you can guess at its meaning. It can also save you a dictionary for use later and you can type in a dictionary if you'd like. This should allow people to build up a common known set of words and rock it out.
I thought it was kind of neat and it shows off what you can do with php and html.