No you can't anymore. It was a rare-once only event that happened before October 2008.
beta
Beta version is just to test out the product. Since it is a test, there is no guarantee that it is safe. Most of the times, though, it is.
A software beta test is a test release of the software. Normally beta testers then take the software and test it out and report any bugs in the software. A few more tests down the road is called a Release Candidate then after those there is the final version.
A software that's not ready. It's been testing to find problems
The most recent live beta of Skype was released on April 30, 2013. There are numerous other beta releases that have occurred and will occur. They are a test release of the next primary version.
There is so called "Software release life cycle". Beta version is the third stage. Beta product is somewhat stable for mass testing but not all features are implemented or they might/will change in next versions. Beta product is in early development stage. It is only released to test it as much as they can. Several millions of people will test software faster are more accurate then doing inside testing.
Beta is the second letter of greek alphabet. A beta version of software is supposed to be very close to the final product, but, in practice, it is more a way of getting users to test the software in the first place under real conditions.
unknown yet, must be soon. Beta test version has been released on 11-1-2010
Now they not giving any more beta key but if you willing to have one visit this site http://honbetakeyoffice.blogspot.com/ They are giving away their beta key
It is the trial site or a test site. It is made to allow changes and bugs to be worked out before the final edition is released.
Beta Test - 2013 was released on: USA: 27 April 2013
Usually all Xbox 360 games go through beta testing. In order to beta test a game, the game will usually send out invites or have contests so players can get a beta invite and test the game before the game comes out to the general public.