From the article:
A Californian company, Global Aerospace Corporation (GAC), is developing remote-controlled balloons for the NASA Institute for Advanced Concepts (NIAC). BBC News Online reports in this article that their goal is to send these balloons carrying robots and cameras to explore Mars skies. But it’s not for a near term future.
Read the full article here: RadioWeblogsMarsBalloon.pdf (2306 downloads)
MORE ABOUT PLANETARY BALLOONS
Read more about Planetary Balloons here