Not to be outdone by the mobile mammoth that is Google, Nokia's prepping its own version of indoor maps for wireless users. Rather than run the risk of being a me too! product, Espoo's Research labs have chosen Bluetooth 4.0 as the main ingredient for its in development location service. The Finnish company's hoping to get a slew of partners onboard so it can begin outfitting retail shops, malls and other well-trodden public spaces with inexpensive antenna arrays that would track a user's movements via device-embedded Bluetooth tags. But indoor positioning for mobile-wielding users isn't the only endgame here, as the tech could also find its way into shopping carts -- useful for gathering analytics on consumer habits. It's certainly a privacy trade-off, but by now you should be well comfy with the notion that digital convenience always comes at a cost. Hit up the source below to take a peek at the proposed equipment.