Hey Beezles,
Somewhat related, I found
THIS to be very helpful when I ran a HDTV coax cable from my attic, through the wall, into a media center box in the floor below. Shoving bare wire through that wall was a nightmare. (Once it hit any resistance, the wire would just bunch up and not go any further). This pull rod was strong enough to punch past any resistance.
It's basically a giant, sectioned fly casting rod. The customer criticism that the sections come off while running the cable is real, but I worked around it by duct-taping the sections so they wouldn't come apart. (Also duct taped the cable to the end of the rod I ran through the wall so it wouldn't come loose). OFC, it only works in a relatively straight shot from point A to B as it doesn't bend that much.
Good luck!