Pipit Members v1.2.0 adds a new runtime function
pipit_members_get_prop() which returns a property of a member. The perch_member_get() function that comes with the Perch Members app only returns the properties of a logged-in member.
pipit_member_get() can be used to return the property of any member:
$name = pipit_members_get_prop('[email protected]', 'name')