iPod as audio guide

I'm making an open source PodGuide site where everyone can submit his own PodGuide. Musea who'd like to get a broader audience can submit their own podguides (Audio guides for ipod). I've created an applicationto generate the accompanying track pictures and info. Have a look: http://www.podguides.net

Audioguides are desing for universal accesibility, helping many people as elderly, blind, partially deft, etc. to access information. Furthermore audioguides can help to provide real time synchronistation with audiovisual and multimedia devices in multiples languages and it provides with the option of multiple foreign languages. Using a mp3 player might do the job, but its hard to believe that it does the job better. It migth also be a cheap option but museums spend fortunes in the artwork and presentation. Having a well design audioguide is only a small cost for museums and they add good value to their visitors. David ( Spain)

Does anyone know more about how the audio guide works? Are there several 'listening points' with additional audio options at each listening point? Is there an application loaded onto the IPOD that provides a menu of audio options for each listening point (e.g., press 1 to year about X, press 2 to hear about Y, or press Z to walk to the next exhibit). regards, M