I have 5 banked night this year and will get for sure 4 additional ones.

1) As I understand my 9 miles will not roll over into 2010, right?

2) If I add an extra night to get to 10 nights, will I be silver elite for the whole 2010 year or only for the remainder of 1009?

3) What do you think. Is silver elite really worth anything? I might stay 10 or 15 days again at Marriott in 2010.