On my HTC Desire HD I currently run Copilot Live 9.4 (126.96.36.199 to be exact).
It has live traffic for free.... well almost for Free. You can get an official 12 months trial for the traffic.
I figured that after 12 months or so I have a different nav-system anyway so I gave it a try.
The traffic information is resonably good. It has a vertical bar during driving which changes color. (Green yellow and red)
Here are some screens of the traffic info.