Yes, Palin should put her money where her mouth is, and actually show up for Newt.
(Some are using her contract with FOX as an excuse to stay away from Newt rallies.)
Moreover, I think Sarah wants this primary process to carry on for a while. She may be for Newt, but from what I have heard from her, she feels that a lengthy hard fought primary will only strengthen the Newt campaign for what is coming up later.