CREATE TABLE table_19930660_1 (rufus_guest VARCHAR, first_broadcast VARCHAR)

Name the rufus guest for 15 december 2008
SELECT COUNT(rufus_guest) FROM table_19930660_1 WHERE first_broadcast = "15 December 2008"
SELECT COUNT("rufus_guest") FROM "table_19930660_1" WHERE "15 December 2008" = "first_broadcast"