With advancements in Internet and media technology making it easy, media piracy has increased. So have the lawsuits.

Here's a look at some of last year's intellectual property battles, and the arguments they made.

Universal Music announced a lawsuit against MySpace, accusing the social networking site of encouraging piracy. The music giant insists that illegally used songs and music videos have played a large role in attracting users and advertisers, and blames MySpace for not doing enough to police its site.

The rapper's publishing companies, Eight Mile Style and Martin Affiliated, filed suit to block six companies from illegally selling Eminem songs as ring tones online. Judgments have been made against the defendants and many of the companies have agreed to license arrangements for future use of the songs.

The Beatles brought a lawsuit against Apple Computer, claiming that its iTunes music store infringed on the Beatles' Apple Corps record company's logo. The Beatles, which have been resistant to making their songs available on the Internet, have been accused of using the lawsuit as leverage in the negotiations to sell Beatles songs through iTunes.

Trade groups representing music publishers have threatened many guitar tablature sites with lawsuits. Largely used by amateur musicians, sites such as olga.net and guitartabs.com offer pages on how to play popular songs. Most of the content is user-generated and offered for free, but publishers claim it is illegal to post the tabs, which are property of the songwriters and music companies.

A Playboy bunny's high school portrait appeared on the Playmate's biography page, bringing a copyright infringement suit against the magazine. Mother Lode Photography, a small photography studio in Shingle Springs, CA, took the photo but never gave Playboy magazine permission to use it in its 50th anniversary issue.

A group of rock stars, including members of Santana, Led Zeppelin and the Grateful Dead, sued a memorabilia vendor for selling unauthorized merchandise and promotional items, as well as offering free concert recordings on his Website, Wolfgang's Vault.

McGraw-Hill took Halfvalue to court over a trademark and copyright dispute. The publisher accused Halfvalue of illegally importing low-quality, foreign editions of McGraw-Hill books and then selling them at a drastically reduced price. The defendants have since agreed to cease imports and pay an undisclosed amount.

When the original Napster shut down in 2001, millions of users flocked to other song-swapping networks. The entertainment industry, however, has started going after the Napster imitators, as well. Companies like Morpheus, and Grokster have been forced to shape up or shut down. Kazaa settled for $100 million and announced it would introduce a legitimate file sharing service.

Major record labels sued XM Satellite Radio, alleging that the company's new device, which allows users to digitally record songs, constitutes copyright infringement. The music groups are asking the satellite radio firm to pay higher licensing fees, comparable to those paid by music retailers like iTunes.

When Google bought YouTube for $1.65 billion, the Internet giant put $200 million in a war chest to fight lawsuits. As expected, the large volume of unlicensed media that gets uploaded to YouTube has brought a flurry of copyright infringement claims.