Information Sharing in a disaster: mobile wikis?

One use of a wiki would be to allow anyone with a Internet capable device (e.g. Blackberries, Iphones, PDA's) to access and share information.

A mobile adapted wiki would seem tailor made for this. One option is Upvise, which has a mobile & web client free to individuals (but also available to businesses) that would be useful for tracking (& thus coordinating)dispersed activities in a disaster.