Jon Lech Johansen, known more widely as DVD Jon, has pulled off a real-life hack on Apple as he bought a huge advertisement space on the wall outside the Apple Store in San Francisco.

The marketing banner placed directly next to the main entrance to Apple's flagship store is about doubleTwist that gives "The Cure for iPhone Envy". The company aims to become a default application for all hardware devices.

The Apple store is located in downtown San Francisco at One Stockton Street and is close to tony Union Square, an area known for its upscale clothing shops.

DoubleTwist Web site, which is co-founded by software reverse engineer DVD Jon, provides an application that is designed to allow the users access their "iTunes Library on any device. In Seconds."

The reports estimate that DVD Jon has paid $2 million per year in rent to use the billboard for the company's advertisement. The ad space on the wall is owned by the Bay Area's commuter transit system (BART).

"This is apparently the first time the window has been used for this purpose (before it just sat bare)," said Techcrunch.com that first reported the advertisement. "And because everything was done legally, Apple's going to have a hard time getting rid of it."

DoubleTwist Corp. was founded in Oslo, Norway by Monique Farantzos and DVD Jon, and is headquartered in San Francisco. The company is backed by venture capital firms and individual investors.

"We started doubleTwist because we were disappointed by the quality of software applications offered by the major device manufacturers," doubleTwist site reads.

"Our vision is simple: to create a unifying media platform that connects consumers with all their media and all their devices, regardless of whether they are online or offline," it adds.

It provides legitimate software application for PCs and Macs to easily move different types of content between devides.

"Apple is the biggest kid on the block and has no incentive to opening up the iTunes software to other gadgets," BBC recently quoted Farantzos, as saying.

"There is a lot of bad design out there," she added. "Companies haven't put any effort into things working seamlessly."