Homepages dealing with genealogy:

Churchbooks of Bornholm Up till 1814.
Danish Demographic Database Danish Censuses - 1769 - 1890.
Familysearch search for your ancestors or family at the Mormons huge database.
DIS Computer Genealogy Society of Denmark.
Danish State Archives Links to a lot of official Danish homepages: National and regional archives etc.
The Danish Genealogical Research Guide Danish Genalogical yearbook, containing a lot of people and the families they are investigating.
Scandinavian Saints Mormon-homepage, with stories about Scandinavians who emigrated.
Cyndi's list American site with a lot of different links to all kind of items concerning genealogy.