Stream is available here, alongside a handy-dandy guide from Perfectly Nintendo on how to obtain a ticket. Bear in mind it not only costs money (approximately $20), but you can only purchase a ticket before August 13th, and the stream goes down a week later on August 20th.
Having watched it in its entirety yesterday, it's totally worth the price; actually, I'm still listening to it! They even sing Happy Birthday when Kirby appears on-stage, which is probably the most precious thing I've ever witnessed (particularly when he goes ga-ga for cake: "ke-ki!") Also, check out Shogo Sakai conducting the Air Ride suite!
Speaking of suites, here's the entire setlist:
Kirby Grand Opening (Green Greens)
Kirbys Adventure Medley
King Dedede and Meta Knight Tag Medley
Kirbys Dream Land 2 Friend Medley
Kirbys Dream Land 3 and 64 Medley
Kirby Super Star Medley
Kirby Air Ride Medley
Kirby and the Amazing Mirror & Squeak Squad Medley
Kirby Turned into a Ball Medley (Pinball Land, Dream Course, Canvas Curse and Rainbow Curse)
Kirby Triple Deluxe Medley
Kirby Planet Robobot Medley
Kirbys Return to Dream Land Medley
Dream Land Staff Roll/Super Star Staff Roll