Generate Dates That Are Not Found In Multiple Ranges

I understand how to find (generate) missing dates for the year 2006 if I have a range value like 1-1-2006 to 3-1-2006. (I'm just using 2006 for arguements sake - the needed approach starts back in 2004 or so and will extend to the current day)

Now the question that presents itself is, is there an elegant way to do this same process with an arbitrary number of date ranges per customer? There would be 1 record per range, per customer

ie:
customer, start date, end date
1 _______ 11-1-2006 : 11-17-2006
1 _______ 12-15-2006 : 12-31-2006
1 _______ 1-5-2006 : 1-31-2006


What I'd like to generate is a record per missing date in 2006, which would be:
4 records for 1-1-2006 to 1-4-2006
several records for 2-1-2006 to 10-31-2006
and then more for 11-18-2006 to 12-14-2006

As I said before, the number of ranges isn't static. It could be 1 or a dozen and could increase as time goes on. At this time, all I can see to potentially make it work in query is to do a dozen joins - which kind of sucks.

My other thought is to do specific processing per customer, per range gap, but it will be terribly slow.