HI,
I live just north of Albany, just south of Saratoga. OUr local pet food store has a lovely Dane who hangs out there when he's not out on the show circuit. They also have a poster on their bulletin board, a Dane rescue group who's always looking for homes for rescue Danes - and sometimes there are puppies who need rescuing!
If you want their number, send me a PM and I'll swing over by there and get it. The other thing you could do is go to the AKC (American Kennel Club) website, click on breeds, click on Great Danes, and besides lots of breed info, you will find links to local breeders and the breed rescue site.
I would recommend staying away from want-ads and so forth, any really good breeder has a long list of customers and doesn't have to advertise. And even if you spend more in the beginning for a quality pup, you save in the long run on big vet bills for a poorly bred pup. Also, any reputable breeder will make good on the dog if there's a problem that's not your fault...
Sorry if I'm telling you things you already know, but I rented(for five years) my last house from one of the top Newfoundland breeders in the world and been active in Newfies for ten years...I've seen so many dogs and people suffer needlessly because they didn't do their research and take the time to find a truly good breeder who produces the best quality dogs possible. Danes are such a wonderful breed, and I'd hate to see you get one that would turn out to be a heartache when it was avoidable.
Good luck and let me know if you want the info on the local Dane rescue group.
PS, all you local folks - don't be complaining that you can't get birds locally,
I have a young roo in need of a good home - anyone interested!!??