Walmart has launched an aggressive push to win market share this holiday shopping season, cutting prices on everything from books to toys to lean ground beef and televisions.

Now, it is taking its effort to reach potential holiday shoppers beyond its typical TV or print ads.

While Walmart is already tweeting, and has launched an official Facebook page (where it now has 43,112 fans), it has now come out with an iPhone application to help shoppers pick out holiday gifts.

“New Walmart iPhone app! U can take pic of your room & see what size TV would look best (and other cool stuff)” Walmart Kevin tweeted today, on the retailer’s behalf.

Indeed, the first edition of the application is focused on electronics, but Walmart intends to adds more products to future editions of the app.

Walmart joins a growing list of retailers, including JC Penney, Target and Best Buy, who are trying to find customers in the land of social media.

While Facebook, Twitter and iPhone apps have not yet gained enough critical mass to make or break the season, in a year where holiday sales might struggle to rise above 2008’s depressed levels, it looks like retailers are determined to chase holiday sales wherever they can find them.

(Photo: Screenshot of Walmart iPhone app)