I've listen to the Newscast several times now and generally I think the show is okay. However count me in as another that finds the overall tone to just to negative. Not that Nintendo doesn't do things that they shouldn't be called out on. Sometimes though I get the feeling that the various host just don't want to be doing the show at times. That they rather be talking about something else. It's this reason I can't listen to the show regularly as I just don't want to deal with it on a constant basis.
I generally listen to Nintendo podcast because I find that Nintendo offers most of the games and styles I tend to like. I grew up on the NES and SNES. For a while I really into the PS1 and PS2 but once I got a Cube most of mine time was there. I have a Wii, 360, PC, and PS3 but the Wii has the most games and has gotten the most play. I'm not against other topics but the constant negativity is why I've tuned out other Nintendo podcast and generally every other system podcast. Especially because after the negativity starts it evolves into actual insults aimed at actual Nintendo fans. Other podcast about other systems just seems to take insults toward Nintendo and it's fans as a must have. I'd like to point out IGN's Nintendo podcast. After Matt C and Mark Bozon left (negativity had really started in their final shows) the next set of host just outright started insulting Nintendo fans and not in a joking manner (in their minds they thought they were joking) that it caused a mini-meltdown in regard to how people viewed that podcast and that section of IGN in general. Do I think that'll happen with the Newscast? I don't think so but really I see what it could lead to.
As suggested I do think those on the Newscast really should sometimes site down and try to listen to some of the episodes.