I listen to all of the 1Up podcasts and would recommend them to everyone (including Retronauts, Sports Anomaly and Legendary Thread - YMMV). I'd definitely put GFW Radio over 1Up Yours as a favourite though but listen to them both religiously - both are better than EGM Live. Ziff FTW.
I've tried the Joystiq
podcasts but have deleted my itunes subs for them - the Bungie one was ok as Halo was getting closer to release (it's also no surprise that it's run by Luke Smith, formerly of Ziff and the 1Up podcasts).
is generally pretty good (it's the guys formerly from the Next Gen podcast).