Von Knopf DanesRecommended Reading (updated 1/21/2010)
A must read before purchasing a Great Dane (very informative and well written): Before You Choose a Great Dane
Great Dane Bloat Information you need to know: Bloat - the mother of all emergencies
Good article on why buy from responsible breeders vs. others: Puppy Mills and Backyard Breeders vs Responsible Breeders
Nice article on dog/breed choices: What Kind of Dog Should I get?
Information on 'tacking' a Dane. By providing this link I am not saying one should tack. It is information for those that decide they may want to do this for their Dane. It is a decision a Dane owner should make for their Dane with the guidance of their veterinarian. Various Gastropexy Procedures
Something to think about and plan for if a dog owner becomes incapacitated or dies: http://www.akcphp.com/BHIACMS/R/documents/Newsletters/2008/Q4/Article3.html
This is a link with a lot of health and welfare type of information on dogs. The website owner is a breeder/owner of harlequin and mantle Great Danes: http://www.chromadane.com/chlinx.htm One caution :) you can get totally absorbed in reading that you lose tract of time!
Behavior related links below. After reading your article of choice, you can click on "Dogs" at the bottom of each page and query for other information. This is one of the best informational site I have found and every article I have read appears unbiased and practical. No fluff, no bull. I do not endorse them, I just like what I have read.
Other Health Links:
Ear Problems: http://www.akcphp.com/BHIACMS/R/documents/Newsletters/2008/Q4/Article2.html