Sometimes the best place to hide something is in plain site. (I said as I opened my trenchcoat.) That's the theory behind this camera set from Brando, which puts its lens inside a clip-on Bluetooth headset designed to be worn on the front of a shirt. It's a clever enough idea, but two things should stay your hand: first, it's from Brando, notorious crapgadget vendor — it'd probably dissipate into base chemicals after a week of use; secondly, it's still rather prominent, which could perhaps make your subjects nervous. Especially if they wonder why your Bluetooth unit is on a cord.
But it's a spy gadget, so difficult to resist — even from Brando. Videos record in low-rez MPEG4 to the 2GB internal memory of the "phone", which can be expanded via miniSD flash memory cards. It'll set you back $270 plus shipping.
Of course now I want an in-ear Bluetooth headset that has a camera built-in while still fully functional as a headset. That should be totally doable, even if keeping the camera pointed forward might be a bit of a trick. That would hold me until someone started selling stylish glasses frames with little cameras inside. That's totally possible now technologically (especially if you wear big geeky glasses like I do), but I suspect there's just not a market for it yet.
Product Page [Brando]