You only listen to two talk podcasts? For shame!
GFW Radio -- officially dead as of this week, but the old episodes are all great and they won't feel that out of date since a lot of the conversations are timeless.
This Week in Tech -- a general roundup of technology news with a number of former CNet/Ziff personalities. It's not so good that it's worth delving into their archives, but if you wanna keep up with tech news there's not many better options.
The Best Show on WMFU -- a weekly talk show from a non-profit freeform radio station out of New Jersey (I had no idea that such things existed before listening). You probably won't "get it" the first time you listen, but stick with it for a 4-5 episodes before you quit.
The Ricky Gervais Show -- only available for a price, in the Audiobooks section of iTunes. Always hilarious, and worth every penny. If you are still averse to spending monye, you can check out old episodes of the XFM Ricky Gervais show from British radio at
http://www.pilkipedia.co.uk/wiki/index.php?title=Download:XfmSModcast -- semi-weekly podcast done by Kevin Smith and his producer, Scott Mosier. Even if you hate Smith's movies, the humor and raunchy chatter here is sure to win you over.
The Sound of Young America -- host Jesse Thorn interviews undeniably great people from the world of comedy. It's like NPR's Fresh Air, but without Joan Didion breaking down into tears or the political nonsense.