Am I doing something wrong? When I receive an email with my user id and password it's blank. But when I look on the app with my g1 I can see my user id, a six digit number, but I have no password. 
I had the same problem, so I just clicked for lost password on their site and they sent me a email with it.
Great app so far, really loved being able to print out all my contacts so I have a hard copy to keep in my files just in case.