The last I had heard, the judge dismissed all of the charges against Barker & the show, except for one, and I apologize for not remembering what exactly wasn't dismissed.
Obviously, today the trial judge threw the whole thing out. From what I'm seeing in the article, considering I have not been down to the L.A. County court house (ever), Curling's attorney is claiming that CBS/Fremantle/Barker didn't respond to his discovery requests in order for him to pursue a fruitful lawsuit against them... my bet is his appeal will be based solely on the discovery request alone.
That's not much to base an appeal on, especially if he didn't make any allegations of non-cooperation during the trial.
Of course, I haven't followed it as closely as some have, and certainly don't know all of the facts - I've just read her initial petition and the few news stories that have followed.