Cleo the Muse [dot] net -

This is still a work-in-progress, but for now, you can choose between a planet and a moon, and receive a 6-character random address. Eventually, this program will allow for generated addresses between 5 and 7 characters in length, with the majority being 6 characters. It will also compare the generated address with a list of canon 'Gate addresses to ensure that no accidental duplication is made.

Heck, if I get really creative, I may eventually allow selection between Milky Way addresses and Pegasus addresses.

Eventually...

For those who are curious about the method behind my madness, I searched through the list of known 'Gate addresses at Wikipedia and made the following observations about six-character addresses:

The first character is always a letter: "P", if a planet, or "M", if a moon. The letter "K" was used for one planet, but it is possible this designation was used only to indicate the planet as completely inhospitable to human life.
There is a 7% chance the second character of an address is a letter.
There is a 91% chance the third character of an address is a letter.
There is a 37% chance the fifth character of an address is a letter.
The fourth and sixth characters are always numbers.

I made other observations about the address data, of course, but some of these won't be relevant until after I have the final program in place.