Two good Bionicle Podcasts I know and got are the BZPowercast, and the BS01 Podcast. I have mostly listened to the BZPowercast, which is very good. Sadly, I am not yet a member on BZPower (the website which made that Podcast), which is a forum for Bionicles.

I have listened to the BZPowercast a lot now, and it is very good!   It talks about Bionicles past and present, and it talks some about Hero Factory.