...
Our contact at Oxfam is quoted - and named - in one of that previous list of articles, by the way.
Would you mind giving me the name? I have already got a "Dear Supporter" form letter telling me to expect a personal reply within
2 working days 
Regarding your absurd mining cellphone idea:
1. What makes you think that SHA256 ASICs will be incorporated into cell phones by the end of 2014? Be specific.
2. What would these chips be doing in the cell phones?
3. If these chips are x10 more efficient than current gen chips, how long do you think a cell phone battery would last while hashing at a meaningful rate?
4. Perhaps offer a list of your current "ethical" clients. Being mentioned in blogs and human interest stories doesn't lend you much credibility -- all of them sound like filler copypasted from a PR release.
Your idea is inane. It is no more interesting than a kid mining dust with a botnet. Sure you can distribute an app to jailbroken old phones, but who cares? Your entire botnet won't mine a tenth of what a single current gen (at the time) miner would. Pointless waste of battery life.
Now go away.

Consider us gone away.