Blizzard isn't putting a hard date on the third major expansion to its popular online role-playing game, but the Cataclysm add-on for World of Warcraft is on the verge of going beta. Blizzard is now sending out beta opt-in invites to press.

The WoW developer is "starting to gear up for the World of Warcraft: Cataclysm beta," accepting sign ups for the early look at the expansion until April 15 for members of the media. April 15 is not the actual date the beta would go live, we should note, as Blizzard does "not currently have a date to announce for the start of the beta test."

It's been a long time since we've had a chance to go hands-on with World of Warcraft: Cataclysm, but it appears we'll get a fresh look at the expansion's major changes and be able to share our thoughts with you about them soon.

Please note that this round of beta invites appears to be for press only. We're sure that Blizzard will make a more formal public announcement when the Cataclysm beta goes wide. Until then, be cautious of any e-mail promising beta access to the World of Warcraft add-on.