searching iPhone app for navigation

I just sold my second computer. In the past, I used this computer to display a navigational program while simming with FSX (actually, Goodway*).I really liked this setup, as it gave me the opportunity to look at the map independently from the flightsim and without seeing the aircrafts position. Now, without the second computer, I could just use a second screen instead, but then I would have to run the sim in windowed mode and lose the sound every time I switched to the navigational program.But then, I have an iPhone, and wouldn't it be great if I could have a simple mapping application on it that displayed a crude map with airports, VORs, DMEs and NDBs! Do you know any such application (or any other solution to this problem)?I only know of X-Planner, the "official" flight planner for X-Plane on the iPhone. However, it seems to be useful only to calculate fuel loads.* Goodway is a flight planner for X-Plane, but I primarily used it for FSX because I just liked its interface