A friend has asked if I can build a site in which some simple editing functions (change text content, upload image) can be done from a mobile phone. Though I've built content managed sites before (mainly with websmith / 4D) this is a new one on me.

Only a pretty basic system is required, but can anyone recommend one that has an update form that will work (and be legible/usable) from a web enabled mobile phone?

Cheers