Call of Duty: Black Ops Zombies ($6.99) has just been updated, adding new weapons, in-app purchases and the ability to save and load game progress.

Ticket to Ride Pocket ($1.99) has recently received an impressive update. Now, fans of the virtual board game can enjoy playing an asynchronous multiplayer mode, which allows users to play up to four online games (via Game Center) rather like Words With Friends or Scramble With Friends, and go between active games whilst other players take their turns. Furthermore, both the iPhone and iPad app - Ticket to Ride ($6.99) - have received improved support for the local game mode, and numerous bug fixes.

Screenshots of the upcoming Sparrow for iPhone application hit the Web recently (via 9to5Mac), before the original post was pulled. Below, we've included a gallery of the images - as you can see, the app looks elegant, well-designed and, in short, everything we expected it to be.

Vokul brings handsfree control to your iDevice, but should Siri be worried?

Reckless Racing 2 has just launched in the iOS App Store, where it's available to purchase and download for $4.99.

Flipboard (free) has recently launched new Content Guides for users in Australia, Canada, the UK and Ireland.

After lingering around in a closed beta for just under a week, Steam Mobile (free) is now available for all to download and use. The application allows Apple fans to interact with the Steam community on-the-go, read the latest gaming news and keep up to date with Steam’s most recent sales and special offers.

Wunderkit - a GTD iPhone app that allows users to work on a project with friends and family - has recently hit the App Store.

Both Photogene applications - that is, Photogene² for iPhone and Photogene for iPad - have recently received updates, adding new sharing options, new edit tools and numerous bug fixes and improvements.

Hatchi - an iPhone app that allows users to care for a virtual Tamagotchi creature on their mobile device - has just received its first update. Now, fans of the $0.99 app can enjoy additional pet statistics, Game Center integration and numerous other new features and improvements.

Food Network In the Kitchen ($1.99) has recently received a major update, adding a brand-new user interface, improved stability, users reviews and more to the popular universal application.

Pocket Informant and Pocket Informant HD - the popular calendar and task-management apps for the iPhone and iPad - have recently been updated. Now, users of the applications can take advantage of a whole load of new features, including Notes and Contact views, Task Smart Groups and much more. Both applications are currently available in the App Store for $9.99 each.

Band of the Day - an iPhone app that allows users to discover a new artist or band each and every day of the year - has recently received an update, and is now compatible with the iPad.

If you went crazy for Reckless Racing back in 2010, fasten your seat belts because a sequel app is set to race into the App Store this February. The news was announced by Polarbit via a Twitter reply, and since a trailer for the upcoming application has hit the Web.

Disney's popular Where's My Water? application for the iPhone, iPad and iPod touch has recently received an update, adding new content ("Cranky's Story") available via a $0.99 in-app purchase.

Rage HD ($1.99) has recently received an update, adding a “Mutant Bash Store” that offers users two new episodes (both are available for $1.99). The update also adds support for Apple’s HDMI output cable, iOS 5 and improved support for the VGA and component cables under iOS 5.

The universal Tiny Invaders iOS game ($0.99) has recently received an update. Now, fans of the puzzle game - which was featured by Apple in the iPhone 4S keynote - can enjoy additional content. Furthermore, a free-to-play version of Tiny Invaders has recently appeared in the App Store: users can play through 15 levels of the popular game before being asked to purchase additional content.

Microsoft has recently launched its MSN UK iPad application in the UK App Store. The app, which is available to download for free, provides British Apple fans with easy-to-access news that's available to view in a Pulse Reader-like interface.

Appigo has recently launched a new version (2.0) of its popular Notebook app, in which support for the iPad and Dropbox is added.

A few days ago, we told you about OnLive Desktop: this new service, which we heard about at CES, promises to gift iPad owners a Windows 7 experience on their Apple-branded tablet, including access to free cloud-storage and Microsoft Office applications. The free application ("OnLive Desktop") has now launched and, though the service appears to be struggling with the initial intense demand, the results are impressive.

It has recently been announced that Age of Booty will launch in the iOS App Store soon. The upcoming application, we are told, will be compatible with both the iPhone and iPad, and is also launching in the Android Marketplace, too.

Canabalt's developer has recently posted a Twitter update in which a new, upcoming iPad game is announced and a mysterious, cryptic website is linked to.

WhatsApp Messenger is no longer available to download in the iOS App Store.