curtailed its hardware partnership with Asustek late last year, you had to know the company would make a comeback to the mobile front in some shape, fashion or form. Starting today, the iPhone and 3G iPad both get the all-new StreetPilot app, which costs $39.99 and provides you with turn-by-turn navigation from the guys who make their living from the stuff. It undercuts TomTom's $49.99 offering for iOS, while offering real-time traffic data, voice commands, lane assist, address book integration so you can navigate directly to your buddies' addresses, and multitasking support. It's looking like a pretty comprehensive piece of premium navigation software, which, if previous rumors bear out, should be landing on BlackBerry devices as well pretty soon. Jump past the break for the press release.