So, before I post the appropriate links, here's a bit of back story on how this happened:
In June of 2008, the annual Can't Stop The Serenity event was making the rounds across the country (for those who don't know, it's a charity screening of Serenity that runs during the summer to benefit Equality Now). There were two events occurring over a weekend, A Music Showcase at a bar where local bands performed for the charity, and a screening of Serenity with an auction of various Joss Whedon products to follow (these screenings now include big screen showings of Dr. Horrible's Sing-Along Blog).

I was able to attend these events, in which I met Tim Minear outside of the bar in the patio while live music was blasting away inside. Puffing on a cigarette, Tim held court with a small congregation of fans as he shared old war stories about battling the rough terrain of network TV. So strong was his passion and frustration, I jokingly shouted, "Yeah, but how do you really feel? Don't hold back!". He laughed as a number of us lined up to get our merchandise autographed.

I was the last person to approach Tim. We chatted for a bit about Nielsen ratings and residuals from DVD and episode sales. I drew my Serenity ticket stub from my wallet and showed it to him. When I presented my DVDs for him to sign, Tim noticed my Wonderfalls box set (I think I was the only one who brought more than Firefly) and so we started chatting about that as well. It was a great, lengthy casual conversation about writing and his various works (Drive, The Inside, Wonderfalls, etc.). At the end, I asked Tim if he would record a bumper for my podcast. He asked the name and when I told him, he then asked, "Wait, do you do commentaries for Firefly episodes?"
I said, "Yeah."
He replied, "I listened to your Out of Gas commentary. I recognized your voice. You should have me on your show."

After my head finished exploding, he recorded his bumper, we grabbed a quick photo and parted company until the next day. After the Serenity screening, Tim took questions from the audience (including one from me about Drive) and I shot the Q&A with my Mini-DV Cam:

I still don't know how to post images into these forums, so I'll just skip ahead to the desired links:

Commentary for Dollhouse 1x05, "True Believer" with writer, Tim Minear.

The conversation continues after that episode in this recording here. It's not a commentary, so you don't have to watch anything else while listening to understand it.

Commentary for Dollhouse 1x12, "Omega" with writer/director, Tim Minear.

Additional commentaries with Tim will happen in the future for episodes of Dollhouse, Firefly, Drive, The Inside and more.