Using your Pocket PC for navigation is cool: just connect it to a GPS receiver and start driving! There is a number of applications that enable your PDA for navigation. TomTom Navigator is a good choice.
One of the advantages of TomTom Navigator is that it allows you to download so called "overlays" from the internet. These overlays contain the coordinates of so called "points of interest" (POI's). If you put these overlays in the directory that contains the map data, TomTom Navigator will show the POI's on the screen.
CheckPOInt adds an audible alert to this functionality, meaning that when you're in a rush, or can't keep looking at your Pocket PC's display, CheckPOInt will still alert you to the approaching POI.