It would be on a separate page (opt-in, I don't want to murder batteries) and users could get XP (to remove captchas earlier, etc) or some of those spots credits to draw dicks on the canvas.
What do you guys think about that? We're currently testing that here.
EDIT: Use this one now. This one keeps track of how much everybody has contributed
I like the idea of it being something we can opt into, and another independent statistic displayed associated with each user account.
I don't like the idea of it altering the XP score or giving users any other special rights compared to those who don't have spare CPU cycles. (While I'm also happy for an XP score to be displayed I think this is a terrible way to determine user privileges, just as voat's CCP score is.)
Just keeping track of how much each user has mined with their account is enough to motivate people to contribute in this way.