I am the proud mom to a Biewer and also to 8 rescued Yorkies. I got "Little Man" from Sue who is a member here on YT and she is very knowledgeable about the breed and a wonderful person. I can tell you from my experience the Biewers personality is much more laid back than a Yorkies but they are Yorkies.
http://www.magnoliasmagnificentyorkies.com/
You can also go to the sister site of YT to learn more about these little beauties.
http://www.biewertalk.com/
Just as a warning it is very important you do as much research as you can on this new breed and talk to many different people before you purchase a pup.