This is what I've found out so far regarding dual nationality for myself:
GUIDELINES ON THE PRINCESS RULE Children born in wedlock to a Danish mother and a foreign father during the period 1 January 1961 to 31 December 1978 did not obtain Danish nationality by birth.
(I was born in 1967)As an alternative, Danish mothers were offered to make a declaration by which their child obtained Danish nationality, cf. s. 2(2) of Law No. 117 of 19 March 1978.
(unfortunately my Mom did not do this)
Children born in this period whose mother did not make a declaration to this affect may apply for Danish nationality by naturalisation according to the Princess Rule.
It is a condition that the general requirements for obtaining Danish nationality by naturalisation are fulfilled. This means that an applicant who has been convicted of an offence cannot be naturalised until after a certain period of time, and that the applicant may not have debts to the Danish authorities.
In addition, the applicant must be able to, without using other languages, and with a natural accent, unhindered take part in an ordinary conversation in Danish. It is not a condition that the applicant must read or write in Danish.
Further, it is a condition that the applicant has been staying in Denmark under circumstances indicating some association with the country. In general, one year's stay in total before the age of 22 is required.
(I lived and went to school in Denmark in my teens though it was for under 1 years time)I was also told by the woman at the Danish Embassy that I would have to prove strong ties to Denmark. I imagine having a husband there and other family will be sufficient.

So, this is all really good news. Now we just have to figure out the whole process of getting him here and legal to work as that is our main concern at the moment.
Thanks for all the help and advice!