How do you mashup services that have access controls in place such as userid and password? Can JackBe pass userid and password to systems for the user or prompt the user for the information?

JackBe's mashup solution, Presto, is architected to support all of the common authentication/authorization/policy paradigms including single sign-on (LDAP, Active Directory) as wll as X.509 certificates and, of course, basic auth.