The Kindle Fire has been a successful device for Amazon, but Barnes & Noble  may be looking to disrupt that with a new lower-cost version of the Nook Tablet.

The current 16GB Nook Tablet is priced $50 over the $199 8GB Kindle Fire. According to The Verge, Barnes & Noble is releasing a cheaper 8GB version of its Android tablet to compete more directly with the Fire.

The Verge's source indicates the new tablet could launch as early as Wednesday.

Does B&N have to undercut the Kindle Fire's price to draw consumers?

WalMart is offering the Amazon Kindle Fire tablet this week with a gift card incentive that essentially shaves $50 off the price.

On the front page of today's WalMart circular, the full-color 7-inch tablet is advertised at the regular price of $199, but it's bundled with a $50 WalMart gift card.

One of the hottest gifts of the 2011 holiday season, the Kindle Fire still sells for $199 on Amazon.com and other major retailers.

I'm wondering just how many Kindle Fires each WalMart store will have in stock. If you're interested, I wouldn't procrastinate.