[Every week, we look at sister iPhone site FingerGaming's top news and reviews for Apple's nascent -- and increasingly exciting -- portable games platform, as written by editor in chief Danny Cowan and authors Louise Yang and Jonathan Glover.]

This week, FingerGaming covers upcoming titles like Sega's sequel to its early iPhone hit Super Monkey Ball 2, and highlights the recent releases Monopoly and A.D.D.

Also detailed are the site's regular weekly looks at the top free and paid apps and the highest-grossing apps of the week, alongside other coverage from the burgeoning iPhone market.

Here are the top stories from the last seven days:

- Top-Grossing Game Apps: Call of Duty Takes Top Honors
"Call of Duty: World at War Zombies overtakes PopCap's Bejeweled 2 in today's top-grossing app charts. EA's Monopoly also sees big first-week sales."

- Riptide Reveals Gravity Sling In-App Purchase Sales Figures
"According to Riptide's sales data, the free-to-play, DLC-supported Gravity Sling has met with 'limited success' so far. The game's overall conversion rate stands at 1.91% -- one in 50 users chooses to purchase the 99-cent upgrade."

- Classic Original Monopoly Released for iPhone
"EA has developed an iPhone adaptation of Parker Brothers' original real estate-trading board game Monopoly, which now joins the company's upgraded Monopoly Here & Now in the App Store."

- Super Monkey Ball 2 Coming Soon to App Store
"The upcoming Super Monkey Ball 2 boasts an overhauled and more responsive control scheme, along with a selection of minigames adapted from the console Super Monkey Ball releases."

- Top Free Game App Downloads for the Week
"PlayMesh's Farmville clone iFarm tops the App Store's free app charts in its first week of release. Last week's chart leader Touch Pets Dogs drops to third this week, as a free version of Finger Physics takes second."

- Adult-Themed Microgame Collection A.D.D. Finally Approved for Sale
"After an unusually lengthy review process, Apple has finally granted its approval, and IUGO's mature-rated twitch-action title A.D.D. is now available for purchase from the App Store."

- Illusion Labs Announces Labyrinth 2
"Illusion Labs announced that it will publish a sequel to its wildly popular marble-rolling puzzler Labyrinth by the end of the year. The sequel will feature a variety of new gameplay elements and a multiplayer mode."

- Top-Selling Paid Game Apps for the Week
"JellyCar 2 continues its three-week run as the App Store's top paid app, as inXile's offbeat trivia title The Impossible Quiz! moves up from eighth place to take second in today's results."