Just two weeks ago we covered iPhone URL schemes, those native URLs specific to iOS applications like Facebook or Twitter that can be used to launch an app's section (Facebook's Messages view, Twitter's Mentions tab) with a single tap. As it turns out, however, URL schemes aren't exclusive to third-party apps that have implemented them, as Apple is using the same system to assign a unique URL to specific sections in the iOS Settings app. Which means that, in theory, you should be able to easily launch Bluetooth settings or iCloud's control panel by tapping on a link.
Of all the solutions that have surfaced in the past weeks to create Home screen shortcuts for Settings without jailbreaking a device, I'd say IconSettings is the most clever, nicest and easiest to use. As noted by Engadget, you just visit this webpage, decide which settings panels to turn into Home screen icons, and manually add a webpage to the Home screen using Safari. That webpage will turn into an icon, which will launch the settings panel you chose from the list. Quite simple.
There's a catch: whilst jailbreak apps like SBSettings really put iOS Settings' in another location (in SBSettings' case, a dropdown menu), IconSettings simply creates visual bookmarks for URLs that redirect to the Settings app. And by "redirect" I mean that you'll briefly notice Safari launching before you're brought to the selected settings panel you need. This should be no big deal as the animation is very short, but this method will still leave an open tab in your Mobile Safari (remember, you're still launching a URL). So yes, IconSettings is a pretty cool web-based trick to create Home screen shortcuts for commonly accessed Settings, but keep in mind that Safari will keep track of these URLs.
If you don't have a jailbroken device and you're willing to compromise to have Settings shortcuts on your Home screen, check out IconSettings here. Its icons are fairly good-looking, too.