Asus officially announced today the Asus R710 portable GPS device with heads up display feature.
The R710 features a 5 inch touch-screen and a rather elegant user interface. The killer feature though is the PathFinder HUD. HUD displays are usually rather expensive options in premium cars. Last year GlobalTop introduced a low cost GPS HUD, but it wasn't really convincing.
It is hard to say at this point if the Asus R710 HUD will work better.

Other features of the Asus R710 PND (Portable Navigation Device) include Bluetooth, 2 GB Flash ROM, 64/128 MB SDRAM, micro SD card slot, USB, Built-in latest SiRF star III chip, light sensor, Windows CE 5.0, and media player.

There is no word on pricing or shipping dates for the R710 yet.
Via this Asus announcement.