I think its a marvellous idea and i for one would be very happy to contribute. What sort of structure did you have in mind? Lots of useful information and tips coupled with some travel stories>? A bit of narrative tied in with useful info? Would you focus on places, practicalities, or funny stories? You need to think carefully about the style i think as well, since sometimes just the tone of a guidebook is enough to ensure its left on the shelves unsold (too functional, too patronising to the well travelled, or just too plain boring). Good luck to you though rootbrewski, i reckon you're onto a winner, because so much travel literature out there is almost useless, and always right when you need some help.
i guess thats why this place is so popular