The Wiktionary infrastructure and organization can be used for a broader scope and become an R&D material very hard to gather otherwise.
In essence, it is about to collect word representations in different electronic media expressions: text, drawings, sound(music), video.
In other words, someone will be able to associate a word with what is a personal best rendering or associated mental representation. It is even interesting to ask for more than one “multi-media definition”.
Having the characteristics for the persons willing to participate and locations all over the world there is possible to develop very sophisticated tools to interpret the results as well as simple viewers for everybody's delight.
I have been thinking for some time and even defined a database at my web site Yahoo hosting account but the organization is already in place at Wiktionary and you can farther the idea.