Opera Software ASA has released a preview of its Mini 4.2 mobile Web browser, which works on almost every mobile phone, according to the company. It’s available to download for beta testing. Also, Opera has added an Opera Mini server park in the United States for faster browsing speeds in the U.S. and the Asia-Pacific region.

This edition of Mini provides a colorful selection of new skins and enhanced support for YouTube and other mobile video services on a wider selection of mobile phones. With Mini 4.2’s improvements in Opera Link, users can share notes between their mobile phones and PCs in addition to their bookmarks and recently visited URLs.

“The number of people using Opera Mini worldwide proves that there is a true revolution going on. People want to access all their favorite Web sites on the mobile phone they have today,” says Jon von Tetzchner, CEO of Opera. “We constantly focus on developing a faster and more personal browsing experience. Opera Mini 4.2 beta is an update that takes mobile Web browsing to the next level.”

Companies interested in the browser can anticipate a large audience. In September 2008, Opera reported 19 million unique monthly users of Opera Mini, which is a 10.1% month-on-month increase from August 2008 and more than 341% compared to September 2007. These users viewed more than 4.5 billion pages in September 2008, with an average of 238 pages per user. These numbers should keep rising, as the company next reported 20 million unique monthly users of Opera Mini on November 11.