According to Nathaniel Clyne's offical twitter account he is on the Nigel Adkins bus or at least a plane to Geneva anyway.
Although no official confirmantion has been posted by either Saints or Crystal Palace (although in fairness the Eagles would only know if they had agreed a fee to save it going to a tribunal with the player being out of contract) the player himself has let it be known on his twitter account that he has signed for Saints and is now on his way to Geneva to meet up with his new team mates.
If this turns out to be the case then he looks just the sort of signing that Saints need for the Premier, an experienced player at Championship level but young enough to learn quickly, he could turn out to be a great signing for the club and a bargain.
If he is on his way to the training camp then it would suggest that all the formalities including medical and signing of contracts are complete and that the Club are just waiting for the registration to be lodged with the relevant authorities before announcing it with presuambly a photo shoot from the training camp.