Patriot SIgning Statement

What is the established precedent for the legal import of executive signing statements. How and or when will this somewhat novel twist on legislative intent be addresssed the Supreme Court. When will the rule of law return? I do not consider myself an alarmist and frankly I am personally unlikely to be impacted by the unrelenting march of the imperialistic executive. This is not what the framers of the constitution envisioned. Depending upon one's political pursuasion the unilateral power grab by this president is either benign paternalism or illegal despotism. One thing for sure, future presidents will seize upon the precedent now being set at least until such time that the Supreme Court is able to restore the balance of powers between the branches.