With iOS4 and the iPhone 4 hitting this week, it’s not so surprising that we’ve seen tons of new apps. This week’s Friday Five features a number of big-name efforts, many of which highlight the features of the iPhone 4 and iOS4. Let’s get started!

Farmville
The productivity-sucking, Facebook-spawned plague has been unleashed upon the App Store masses. Someone say a prayer for us all. The iOS version is supposed to sync with the Facebook version, so if you already have a farm, don’t worry about maintaining two! Just like on Facebook, you “grow” both plants and livestock and earn coins and XP for your troubles. This app also includes in-app purchase options for both coins and premium “Farm Cash.”

Eliminate:GunRange
I don’t know why Eliminate:GunRange is missing spaces in the title. I can tell you, however, that it’s ngmoco’s brand-new, iPhone 4-exclusive title. A spin-off of the popular Eliminate FPS series, GunRange is designed to take advantage of the iPhone 4′s gyroscope and Retina display. The game drops you into one of three shooting ranges and lets you blast away at targets using any of twelve weapons. Support for the iPhone 3GS and additional content are promised in the future.

Windows Live Messenger
Despite the whole Apple/Microsoft battle, Microsoft has apparently seen fit to release a messenger client for its Windows Live service. It’s pretty much your typical IM app, with hooks in most major social networks (Flickr, Facebook, Youtube, MySpace, etc). In addition to chatting and sharing photos, you can access your Hotmail email account from within the app.

NPR Music
NPR is a wonderful, wonderful organization. It’s simply incredible how much they give away, for free. NPR Music follows their long-since-released NPR News app and gives you access to NPR’s musical selections. Listeners can choose from Classical, Hip-Hop, Jazz, and more. Live streams from over 75 public radio stations are available. Folks with new iPhones can take advantage of backgrounding, listening to music even when the app is closed.

DC Comics
DC makes its iPhone debut with many familiar comics: Batman, Green Lantern, the Justice League, Sandman, and more. The app itself is something like a comic-store, from which you can download individual comics via in-app purchase. Most comics run $1.99 apiece. (A few freebies are available, too.) For viewing comics, there’s either a full-page view or a Guided Reading option; with the DC app, all of your comics are contained in one simple app. Comic lovers should at least download the free app and check out the full selection.

Lexcycle, acquired last year by Amazon, released a version of their popular iPhone/iPod touch eReader Stanza for the iPad last week. Stanza was my eReader of choice on my iPhone and I’m thrilled it’s finally been ported to the iPad. It’s a terrific reader that’s compatible with a wide variety of different formats. Before Stanza for iPad was released, I used Calibre to convert my eBooks to iBooks’ required ePub format. Stanza allows users to read in a whole bunch of formats, and the 3.0 release adds PDF, DjVu, and Comic Book Archive support to Stanza’s already extensive library of readable files.

Stanza includes the most customizable reading interface I’ve seen on a mobile application. It allows you to customize nearly everything, from the page turning animations (a slide like the Kindle’s or a page turning animation like iBooks’) to the background and color of the text. Stanza really does make the experience all about the text – the user is able to customize everything about the way the book is viewed. Barnes and Nobles’ app was lauded earlier this week for including the same customization but their application locks you into using their bookstore. Stanza lets you load your own books onto the iPad or iPhone. It also, however, allows you access to a variety of other eBook stores directly from the phone.

Perhaps the application’s best feature is Stanza’s Detail views for text. Highlighting text using the traditional copy and paste mechanism in iBooks yields a tooltip that lets you bookmark (highlight) and look things up in the dictionary. It’s a more complicated scenario in Stanza but one that offers one additional option – the ability to share text on Facebook, Twitter, and through email. The detail view pulls up the paragraph in question in an iPhone-sized window and makes it easier to select text.

Stanza works perfectly with Calibre, my app of choice for eBook conversion. It now allows for a really simple workflow to get eBooks from the desktop to an iPad. It’s possible to move books by utilizing a computer as a wireless server, or by pushing them from Calibre into iTunes. It’s also possible to drag books into iTunes and into Stanza.

Stanza is the ideal reading experience, with customizable colors, animations, and more and compatibility with dozens of different formats. The Lexcycle team has succeeded in bringing the great iPhone app to the iPad and I, as an avid reader, am glad they did so.