The second season of MTV’s reality hit, Jersey Shore , will debut this coming Thursday. To build anticipation around the first episode fist-pump style, MTV is releasing a Facebook game and iPhone app that will feature the show’s larger-than-life personalities in cartoon form. The Facebook game is a Jersey-Shore -lover’s dream come true and challenges players to battle each other in head-to-head pickle and tanning lotion throwing competitions

Runner’s World magazine today announced the release of its SmartCoach iPhone app, which creates customized training guides for race distances between a 5-K and a marathon. Users can input their most recent race time, weekly and long-term distance goals, training level (maintenance, moderate, hard or very hard), the day they’d like to schedule their long runs and the amount of time they’d like to train for (up to 16 weeks) to receive their customized plan. The app suggests a running distance and pace that varies each day, increasing in distance and speed and then tapering off shortly before race day.

Photo-sharing service Flickr has released version 1.2 of its iPhone app, adding several new features to take advantage of the iPhone 4 .

eBay is on a mission to make itself an online destination for fashion-conscious shoppers, first with the launch of fashion.ebay.com in April, and furthered today by the launch of its eBay Fashion iPhone app. As one would expect, the app [iTunes link] gives users access to eBay’s listings in the fashion category, as well as the “Fashion Vault,” eBay’s version of Gilt Groupe , a site that offers a mix of designer luxury goods for up to 70% off retail prices beginning at noon ET every weekday (incidentally, one of Gilt Groupe’s founders was a former eBay employee). My favorite feature is the Closet.

I love Boxee , the media center with a social twist. While I’m disappointed that I won’t get to have my very own Boxee Box until later this fall , the Boxee crew has just posted a video showing off the final device.

Mashable’s Spark of Genius series highlights a unique feature of startups. If you would like to have your startup considered for inclusion, see details here . The series is made possible by Microsoft BizSpark

iMovie for iPhone is the official Apple application that lets iPhone users record and edit high-definition video to publish directly to YouTube or send via MMS and e-mail. The application, available for $4.99 [iTunes link], is simple to use and yet surprisingly feature-rich for something on a mobile device. Experienced video editors will have no problem picking up iMovie for iPhone 4

Music videos are going to become a lot more accessible come July, as Vevo will launch its official iPhone app during that sweltering month. We got a sneak peek at the upcoming toy. Yesterday, I sat down with Rio Caraeff, the CEO of Vevo, for an informal discussion about the music video service, the music industry overall and what’s going to be coming out of the company in the near future.

eBay has acquired RedLaser, a barcode-scanning app that helps users locate the best price for a product and uncover further information, from technology startup Occipital. Occipital will remain a freestanding company. The paid app [iTunes link], which was featured in Apple’s “Shopper” commercial for the iPhone (see below), is now available for free.

Boyfriends and bachelors beware: Tiffany & Co.’s iPhone app [iTunes link] for engagement rings arrived in the App Store today, and it’s been carefully engineered for getting clueless and/or commitment-phobic grooms onto the engagement ring floors of Tiffany stores. For those looking to buy or receive a Tiffany’s engagement ring, the app brings the smooth, uncluttered shopping experience of the jeweler’s Flash-based website to the Flash-averse iPhone, iPod touch and iPad.