Great news! Riftworld Chronicles has now been released! If you're in the US, ConTV Channel has the entire series (8 episodes worth) on their website. CBC Punchline has also made the episodes available on their YouTube channel, and this is accessible to international audiences.
Tahmoh (as well as co-star Erin Karpluk) has been doing a flurry of press from last weekend's San Diego Comic Con, and in the lead-up to Riftworld's release, so I'm including them as a masterpost here, so keep checking back for new podcasts and interviews if/when they become available.
Review of the Riftworld Chronicles by SFFWorld
Review by NZ Book Lovers.
Tahmoh Penikett's Portals Prophecies and Pants by TV Eh [podcast; also on iTunes]
Tahmoh Penikett - A BSGM Exclusive Interview On Life, the Arts, his Inspirations and Riftworld Chronicles by BSG Museum.
Interview with Tahmoh Penikett and Erin Karpluk about their new online series Riftworld Chronicles by Nerdgeist.
Talking Riftworld Chronicles with Erin Karpluk and Tahmoh Penikett by CBC [video]
The Tahmoh Penikett interview by Sci-Fi Podcast [podcast]
Tahmoh Penikett talks Riftworld Chronicles by Scene & Heard [poadcast]
Tahmoh Penikett talks Riftworld Chronicles, Battlestar Galactica and that Supernatural Parody video by TV Goodness
Sci-Fi Talk podcast interview with Tahmoh [podcast]
The Blast interview
Galacticon Preview: Interview with Tahmoh Penikett by Steve Strout
Riftworld Chronicles star thanks Supernatural fans - ScifiNow
Interview with SFFWorld
Interview with Tahmoh Penikett and Erin Karpluk by Limited Release [podcast]
Tahmoh Penikett enters Riftworld Chronicles by Westender
For those who read German, here's one passed by a fan: http://zeitzeugin.net/2015/07/webseries-riftworld-chronicles-staffel-1/
Let us know on Facebook or Twitter if we've missed any!
And for that Supernatural Parody video mentioned above, here you go: