Schengen "Big Bang"

This is an important development, but is the European Union really ready for it? Schengen is a boon for air and road passengers, but are the external borders of the EU adequately policed? It has been argued that "organised crime" abolished the borders long before Schengen came along. "Fortress UK" is always suspicious, but are the arrangements to communicate criminal records across borders, follow investigations and safeguard human rights really in place?
How do researchers from other Member States feel? What has been published evaluated Schengen?
In a week when the UK government "lost" details on 25 million citizens, how do we feel about the second generation of the Schengen Information System?
Organised crime, cross-border crime or criminal networks...is the Schengen system relevant? The Institute of Advanced Legal Studies had a research report on the feasibility of an all-EU criminal records database which I will link if it is still on the web.