Spotted this morning at the New York Stock Exchange: CNBC financial reporter Erin Burnett slurping on her McDonald’s super-sized coffee and chatting on her cell phone, while interviewing at least one astonished source. She also sported a sleeveless white shirt that would look more appropriate on a “Wall Street hooker,” rather than a supposedly esteemed journalist, one Big Head DC source says. We caught Burnett later fiddling with her earpiece on Joe Scarborough’s morning program, while cackling up a storm. The gal looked like she was enjoying herself, but is she pulling respect to her network? Time will tell…but, insiders say, despite her flashy faux pas, the FOX Business Channel is still eager to hire her away. Stay tuned.