The problems aboard Good Morning America's Whistle-Stop Tour are not over. Yesterday we told you about growing concerns inside ABC about Diane, Robin, Sam, and Chris touring the country in a train just after the same mode of transportation killed 25 people, as well as the scandals plaguing the producers responsible for keeping the show running. Now, we're told, more drama:

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JOSSIP REPORTS — Good Morning America is embarking on something called the Whistle-Stop Tour, which, like every other news entity seems to be doing, wants to visit all 50 states before Nov. 4. Timeline: 50 days. As we understand it, it's basically a glorified witch hunt for swing voters.

And like John McCain's Straight Talk Express, Diane, Robin, Chris, and Sam have The GMA Express, their very own customized choo-choo train to take them all over this great nation, from which they'll also broadcast live. (Except: Hasn't rail service to America's small towns been slashed dramatically over the past decade?) There's a video explaining the whole concept here.

Indeed, it's a pure ratings stunt.

Too bad the whole thing is coming off the rails (groan!) thanks to a mountain of in-fighting, old scandals again rearing their heads, and the most recent association Americans have with trains: how they just killed 25 people.

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"I've taken my cue from people here and from viewers, especially [cancer] survivors . . . who said, 'When it's time to literally flip your wig, you'll know,' " Roberts said. "I am not my hair," she said, quoting from the song by India.Arie. "I am the soul that lies within and that's it - no more wig. That's it." Roberts will auction her wig to raise money for a charity that helps "those who don't have insurance and can't afford this." [NYP]

Breast cancer fighter and GMA anchor Robin Roberts owes you one for being so supportive. Also: "Early detection" is her eighth rule about staying healthy? [ABC]

I never thought I'd be writing this. … I have breast cancer.

So in the coming months, you will probably notice that I will have my good days and my bad days, but I know I will get through it with the love and support of my family and friends…

To you, our viewers, please know that your thoughts and prayers very much sustain me as they always have each and every morning when I sit in the chair next to Diane and say "Good Morning America." You have always been there for me … and I love you back.

–ABC's Robin Roberts announces that she has breast cancer and is seeking treatment, attributes her discovery of the disease to her longtime friend/colleague, Joel Siegel [via ABC]

Breaking News! Matt Drudge flashing light news! Charlie Gibson will take over Elizabeth Vargas' spot at ABC as World News Tonight's anchor. It is also being reported that the woman to take his place at Good Morning America will be Robin Roberts. From Drudge's super inside source:

Vargas Chooses to Step Down; Will Return to Anchor 20/20 After Maternity Leave in Fall… Robin Roberts named co-anchor GOOD MORNING AMERICA with Diane Sawyer… MORE.. Top ABC News source: 'Charlie has a long term deal at WNT and will be in the chair in June, months before Katie. The stage is set for an unprecedented race this fall'…

So far, that's all Drudge's report has to offer, and neither Google or AP have anything else on the matter. But we'll keep you updated.

We are also going to conduct a brief investigation as to whether or not Cindy Adams predicted this last month.

Update: Oh, Drudgie, you so crazy. His "ABC insider" was actually ABC news … which he finally included a link to. From the announcement:

Gibson's new assignment will take effect on May 29. He will continue as a co-anchor of "Good Morning America" until June 30.

"I am humbled to accept this new assignment. I have witnessed firsthand the grace and determination of every member of the staff of 'World News Tonight.' I look forward to joining this extraordinary team and to helping the broadcast start a new chapter," Gibson said.

Yay! We won't have to watch Katie Couric on CBS for even one day!

Charles Gibson Named Sole Anchor or 'World News Tonight' [ABC]
THE MAN WHO WILL BE ANCHOR: CHARLIE GIBSON TO SOLO 'WORLD NEWS TONIGHT' [Drudge Report]