No, the store is not open yet, even though the WSJ article did say that the store would open today. They were wrong.
No. Open beta means people can join the creators site and become part or the creation or testing process.
Now before anyone moans about harmonies being "wasted" on Green Day or whatever, just ponder the implications of this. If Green Day gets harmonies, then it's pretty safe to assume that Harmonix views harmonies as a permanent upgrade to the Rock Band platform. This is probably the strongest evidence that we'll get harmonies in Rock Band 3.Nrama: Are we looking at any new features, similar to Harmony being added in The Beatles?
DeGooyer: There's a couple little things, I don't know what we've announced yet. Harmony IS going to be in it, and basically, it takes into its purview all of the Rock Band platform.
• Blue öyster Cult – “Godzilla”
• Blue Öyster Cult – “Transmaniacon MC”
• Hawkwind – “Master of the Universe”
• I Mother Earth – “Levitate”
• Motörhead – “Killed by Death '08”
• Nazareth – “Hair of the Dog” (2008 re-recording)
• Rage Against the Machine – “Bulls on Parade”
Price: $1.99 USD, £.99 UK, €1.49 EU (160 Microsoft Points for Xbox 360) per track
$2.00 USD (200 Wii Points™) per track