I am highly critical of the release of the cables. It contained very little information for the damage done. I think the decision to release those cables was because they could release them and not due to the insight they provided. My impression is that ego and publicity had a lot to do with it.
On the contrary, the cables contain plenty of evidence of government wrongdoing, although not necessarily by the US government. As a Swede, it is very interesting to know that the us embassy reports that my government prefers to share information about Swedish citizens using a "strong but informal agreement" instead of having a formal agreement, as such an agreement would have to be discussed by the parliament. If the cable is correct, my government is probably violating the Swedish "grundlag", which can loosely be translated as the constitution of Sweden. See http://www.thelocal.se/30654/20101206/