This is a link to one of the best dog breed description sites I have found. I think you will find lots of info here on your new puppy!

http://www.dogbreedinfo.com/bernesemountain.htm

I work for a doctor and a couple of our patients have brought their new puppies in to meet us. About a year ago I met my first Bernese Mountain Dog. He was about the age of your puppy and was such a snugglebug in my arms. I did notice, though, that he was HEAVY to hold for too long!!! I haven't seen him recently but I am sure he is a big fellow just like yours will be. I don't think there are a lot of Bernese breeders around. I think these people had to go on a 4 hr. car trip to get him.

Anyway, lots of luck with your puppy. I am sure you will notice a great many differences between your Maltese and your Bernese. Mainly, about 100 lbs. worth of difference ! Keep us posted and we'd love to see pictures.