The revised project is named Loon. Balloons will travel at an altitude of some 20 km, and each one will cover a territory of about 40 km.
For the moment, Google doesn't appear to have answered satisfactorily the question of avoiding collisions with other aircraft. A commercial airliner would look so silly if it reached its destination covered in Google packages. The situation would be far worse than silly if if the jet's engines were clogged up with torn strips of a hot-air balloon.