The Para-Shoot Kickstarter project has now moved to pre-order phase and looks set to be the most practical visual life-logging tool yet — it can cover a whole day in relatively high resolution, but the creepy thing is that, unlike the Vicon Revue/Sensecam, this is designed to not look like a camera. The high resolution combined with the fact that you can’t tell when it is recording is going to raise the same ethical questions as Google Glass.
EDIT 22 Aug 2013: previous mention of the neckband battery was from the ParaShoot v1 (unfunded) kickstarter page that I had linked to in error, thanks to Dave and others for pointing that out!
UPDATE: kickstarter has suspended funding for para-shoot, no explanation yet. There are suggestions on twitter that the hardware has been cloned.
UPDATE: campaign now moved to indigogo but no explanation for kickstarter suspension.
UPDATE: looks like this is a re-badge of an available Chinese product called Unieye, see for example this eBay listing: