Here is your regular dose of Sagan (tip bad astronomy):
Also, check out this Science & the City podcast on Sagan's search for God with Ann Druyan, Steve Soter, and Neil deGrasse Tyson (tip from Open Parachute). Its a bit long (1hr 23min) but there is some excellent discussion about wonder and nature, and on the use of the word spiritual. Perhaps one of the high points of the podcast is a little past the mid-way point (just after Steve reads the last passage from Cosmos) where Neil raises the question if this naturalistic-spiritual way of life is enough to comfort those who have lost a loved one or a child? Check out Ann's response to this question.