I agree about the top loading. As to the charging capability, It would probably be good to give a few minutes of talk time for a dead phone, but that might be enough in an emergency. Also, since you would not use phone to walk and talk, a few minutes each day would be enough to "top" it off, especially if you're using the phone as a camera or GPS device. Also, Duracell makes a very light LiIon battery you can charge from a USB port (which this stove supposedly has), so you could use this to store power for when needed.
I'm not a great fan of bringing too much "civilization" with me into the woods- part of the allure is that NOBODY can call, text or otherwise bother me, and don't use an MP3 in the woods, but it would be unfair to impose that philosophy on others, as I believe everyone should be free to hike their own hike. But anyway, the charger is just a side benefit. I'm more interested in long-distance, self-sufficient hiking, where you have to carry all your supplies with you (no mail drops). I like to hike into wilderness such as the Wind Rivers, hiking and fishing, so the weight of fuel can be an issue. Also, since it uses twigs, you don't chop wood or damage trees (the only other drawback would be the banning of open fires due to wildfires, or extended hiking above treeline where fuel is scarce). BPL just published a review of Jetboil stoves, and they weigh about the same as this, after you factor in the fuel.
Since this stove was developed as a humanitarian aid for third-world countries, I would imagine it would have to be both simple and rugged for daily use by technically-unsophisticated users. I filled out the contact info request, so I hope to get more information on this.