Though Siri-powered tweeting isn't something we can do officially on our iPhone 4S handsets, one jailbreak tweak - to be released before the end of the week - promises to add the ability.

The iPad's great, but for some reason there are a few built-in iPhone apps Apple decided to keep away from the "magical and revolutionary" tablet. If you have an iPhone and iPad, you'll know that your smart phone's Calculator, Clock, Compass, Stocks, Weather and Voice Memos apps aren't built into the iPad version of Apple's mobile operating system, which is a bit of a shame (especially, I would say, with regards to the Clock app).

Following on the heels of the "Absinthe" Greenpois0n release, SiriToggles, a jailbreak tweak to expand Siri's capabilities, is scheduled to make it into the Cydia store very soon.

Recently, more information regarding the iPhone 4S jailbreak has hit the Web. In a Twitter update posted by @planetbeing, it was noted that the jailbreak "dream team" has managed to get unassigned code to run on an iPhone 4S handset. Furthermore, a demo video of a jailbroken iPhone 4S has been posted online, and the Corona package has received an update that fixes iBooks.

The jailbreak exploit that powers the Chronic Dev Team's Corona package has reportedly been patched in the latest beta version of iOS 5.1. Because of this, potential jailbreakers are advised to update to iOS 5.0.1 before it's too late, and avoid iOS 5.1 at all costs once it finally goes live.

A jailbreak tweak called "AllMail" allows Apple fans to interact with all available emails in the built-in Mail app.

Messages+ is a jailbreak tweak that vastly improves the messaging experience on an iPhone handset.

The jailbreak "dream team" currently hard at work on developing a jailbreak solution for the iPhone 4S (and iPad 2) has recently made significant progress. In a recent Twitter update, @planetbeing notes that the sandbox difficulties @pod2g had previously mentioned have now been conquered, meaning we're one step closer to seeing the release of the all-important jailbreak solution.

Recludo is a new jailbreak tweak that is as simple as it is useful. Once installed, unlocking an iPhone or iPod touch when the music controls have been invoked will take users straight to the Music app, rather than to their Home screen.

A new jailbreak tweak called "Blutrol" promises to make users' iCade control cabinet compatible with any iOS game that sports on-screen controls.

ShakeToUnlock has recently received an update that adds support for iOS 5. The jailbreak tweak, which (as its name suggests) allows Apple fans to unlock their iPhone by shaking it, is currently available to download in the Cydia Store for free.

A new jailbreak tweak called SuperSwitcher allows Apple fans to bookmark their favorite applications and access them easily from the multitasking bar.

Though TapDeWiggle might sound rather a lot like the name of some obscure, urban dance track, it is in fact a jailbreak tweak that some Apple fans might find quite useful. In short, TapDeWiggle allows fans to exit wiggle mode without having to press the Home button: instead, touch any empty space, and those app icons will promptly stop jiggling and wiggling about.

Ipsum is a new jailbreak tweak that allows users to easily dismiss Lock screen notifications with a double-swipe.

A new jailbreak tweak called “Mail More Photos” allows users to attach more than five photos to an email.

A jailbreak tweak called "Display Recorder" has recently received an update that adds iOS 5 compatibility.

A new jailbreak tweak called "LockLauncher" allows Apple fans to launch applications from their iPhone's Lock screen.

The iOS hacker responsible for untethering our Apple A4 devices under iOS 5.0.1 has uploaded a post to his blog, in which the recently released exploit and package (called “Corona”) are discussed in-depth.

A jailbreak tweak called “Motion” allows Apple fans to inject some life into their iPhone’s SpringBoard, and configure application icons to jump, shake, soar and slide in a number of different ways.

A new jailbreak tweak called “Pull To Dismiss” allows Apple fans to hide the virtual keyboard simply by dragging a finger down their iPhone’s screen.

SwitcherLyrics ($0.99) is a new jailbreak tweak that allows Apple fans to view the lyrics of a playing song within the app switcher.

A new jailbreak tweak called SBStickyNotes allows users to add "sticky notes" to their iPhone's SpringBoard.

Steve Troughton-Smith (@stroughtonsmith) and another iOS hacker known as @themudkip have now managed to port full-resolution iOS applications to a second generation Apple TV.