There are a lot of wine websites on the interwebs. There is no better regional wine website when it comes to depth and breadth of content and expertise.
Lenn Thompson http://newyorkcorkreport.com/

Tinta Cão

Tinta Cão

Tinta Cão (Spanish) – [http://catas.opaz.net/pronCVS/tintacaoCVS.mp3]

Literally “the red dog” this port wine variety is a thick skinned grape with small clusters of medium sized berries. Tend to produce lower alcohol wines that when blend lend floral characteristics to Port wines. Till recently it has been the least planted Port wine variety, and now is enjoying a small revival in new plantings. Most likely you will never taste this variety as a mono-varietal wine, but rather blended with Duoro reds and Port wines.

Search here for tasting notes for Port wines: Port Wine Tasting Notes