Not to be outshined by Obama's roasting of McCain, or Tina Fey's spot-on impersonation of her, Sarah Palin might be making a cameo on SNL this weekend (after flip-flopping about appearing). The show isn't confirming anything just yet, but the Daily News notes a good fit, with the episode being hosted by Josh Brolin, who stars in Oliver Stone's film "W" about President Bush. If Palin does in fact show up, Mark Wahlberg may have a harder time getting through security. Following the parody Andy Samberg did of him last week, the actor said on Jimmy Kimmel last night: "When I see that kid, I'm gonna crack that big f*cking nose of his...and then I'm gonna tell him 'Say hi to your mother for me." He added: "I'm gonna get on a plane tomorrow, I'm gonna go down to 30 Rock or wherever the f*ck they shoot that show, he probably doesn't have a dressing room so I have to find him in the cafeteria or wherever, and I'm gonna slap him in the big nose. Tune in, I gauran-f*ckin-tee you." Looks like someone can't take a joke.