According to the NPD Group, an industry group which monitors monthly and yearly North American software sales, Nintendo's popular Wii Fit exercise program is about to become the second-best-selling 'videogame' since 2000.

Since being released last April, the $89 game which comes with the Wii Balance Board has skyrocketed up the sales charts, and has stayed there regularly since. "The appeal of Wii Fit is so broad and its ability to keep attracting new users every month has really played out time and time again," says Cammie Dunaway, Nintendo's executive vice president of sales and marketing. But we already knew that!

Wii Fit sales have beaten even the top Wii games such as Super Smash Bros. Brawl and Super Mario Galaxy. They've even beaten Madden games or Guitar Hero games. It's even bigger than Call of Duty: Modern Warfare and Halo 1, 2 or 3. The success if likely because the Wii Fit attracts both old and new gamers. Even for people who think of themselves as "non-gamers" can play, and do.

Making Wii Fit a blockbuster is the fact that approximately 7.9 million copies of the game have been sold in North America through August 2009, according to NPD. Mario Kart Wii is ranked at number five with 6.7 million units sold, so Nintendo is grabbing positions with its Wii offerings generally.

It's true though that Wii Fit sales, which were strong in January, began to drop off each month since. Will sales resume for the holidays? Well, the game still sells well, and it's likely that September sales will keep Wii Fit on the charts. Especially with the recent release of Wii Fit Plus on October 4.  In order to compete with cheap toys, Nintendo lowered the price of the console to $199, so Wii fit bundles are also a good deal now.

And guess what - the top seller since 2000? It's Wii Play with sales of over 11 millions units. Next is the Vitality Sensor - with release dates and details still to come. This sensor will monitor your heart rate and tailor your experience to your mood. Nintendo just keep innovating - with more for the Wii Fit and Wii console coming soon.

This is a list of the top 10 best-renting video games, according to movie retail store Blockbuster. Rent these top 10 games for your Wii from GameFly™. Start for $8.95 or Try For Free!

Games below are listed according to title, company, the gaming system, and the software rating from the Entertainment Software Rating Board (ESRB).  You can rent any of these games, and try them out before buying, get a free 10-day trial at GameFly using this link.

Use Coupon Code TENDAY to start your 10-day free trial today to GameFly!

1. Resident Evil 5 (Capcom) for Xbox 360; also available for PS 3; rated "M" (blood, gore, intense violence, strong language)

2. Call of Duty: World at War (Activision) for Xbox 360; also available for PS 3, Wii, PS 2, DS; rated "M" (blood, gore, intense violence, strong language)

3. X-Men Origins: Wolverine (Activision) for Xbox 360; also available for PS 3, Wii, PSP, PC, PS 2 and DS; rated "M" (blood, gore, intense violence, language)

4. Fallout 3 (Bethesda) for Xbox 360; also available for PS 3; rated "M" (blood, gore, intense violence, sexual themes, strong language, use of drugs)

5. Wanted: Weapons of Fate (WB Games) for Xbox 360; also available for PS 3; rated "M" (blood, gore, intense violence, strong language)

6. Resident Evil 5 for PS 3

7. Major League Baseball 2K9 (Take Two) for Xbox 360; also available for Wii, PS 3, PSP and PS 2; rated "E"

8. X-Men Origins: Wolverine for PS 3

9. Gears of War 2 (Microsoft) for Xbox 360; rated "M" (blood, gore, intense violence, strong language)

10. Halo Wars (Microsoft) for Xbox 360; rated "T" (mild blood, mild language, violence) (Ratings: "E" for "Everyone"; "T" for "Teen"; "M" for "Mature 17+")  

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• Wii sales propel Call of Duty: World at War past COD4 (joystiq.com)

Here are the latest Wii games coming out shortly:

Boom Blox: BashParty (Electronic Arts, Rated E)

Boom Blox: Bash Party (EA) is the sequel to the popular game from last year,  "Boom Blox," which is a puzzle game (director Steven Spielberg co-created this game). This game has 400 levels of puzzles for you to solve.

The premise is, on Earth many things are made of blocks, as well as under sea, and in space.  The goal is to use slingshots, paintballs, slingshots and similr items other devices to break these block-things up, at teh same time defend from the creatures attacking you.  You can also create your own setups and levels and even upload them online; or, you can get new levels to download online.  Release for the Wii is this week, retail price is $50 for Wii. Some cartoon violence.