PollEverywhere: a tool for conducting a survey on mobile phones

This survey tool is just something I've stumbled across but I can see it being an interesting way to get students' opinions via their mobile phones. Getting students to fill out questionnaires/surveys (particularly feedback on a course) can often be pretty painful so I'm thinking this alternative format might intrigue them enough to get involved. Plan to try this in the next few weeks so will report back on how successful it was.