#13 - Aug. 23, 2009, 10:38 p.m.
Any information regarding the newly announced expansion, Aleraza, will likely be posted on the Cataclysm page.
http://www.worldofwarcraft/cataclysm I would also assume that there will eventually be a Cataclysm forum similar to the Wrath of the Lich King one.
The Alpha test phase is usually internal. The beta testing phase is when we start to invite additional people outside the company. More information regarding the expansion, including any announcements regarding Beta testing will likely be posted on our main website, in the General Discussion Forum or the possibly pending "Cataclysm" forum.
Good luck, Aleraza, hopefully you will be able to test it out. Note that this is a newly announced produce so it may be awhile before the public testing phase will be available.