We know, we know… It’s been a week since this first appeared… But hey, we’ve been busy, okay?

Our friends over at iPhone Atlas have launched what they’re calling an Unofficial iPhone SDK Guide for writing native apps for the iPhone. The “Unofficial SDK” relies heavily on the work of Lucas Newman, the pioneering iPhone developer who wrote Lights Off, the first native iPhone game.

While you may be tempted to pause for a moment given Apple’s recent announcement about the impact jailbreaking and unlocking may have on future iPhone software updates (see our story below), and while you may prefer to stick with Apple’s recommended Web 2.0 development cycle (hey, we’ve got a story on that, too), iPhone Atlas’s guide aggregates some of the most useful information for native app development we’ve seen.

It’s at least worth a peek, no?