[LVS edit: More about Jones' decision here, courtesy of Adam Rittenberg.]
From the Detroit News' Michigan State Twitter page:
Breaking news: Greg Jones staying at MSU for senior season. More at Detnews.com later today.
It's also been confirmed by Rittenberg's Twitter page as well:
Greg Jones coming back to Michigan State for his senior season. Big, big boost for the Spartans defense.
AND NOW WE DANCE.