Are there any tenets of Gnosticism that are still present in the church today?

Towards the end of the New Testament writing, the heresy of [gnosticism](http://en.wikipedia.org/wiki/Gnosticism) was one of the chief "false teachings" against which Paul and the other writers were contesting. Could someone present some of the chief teachings of the Gnostics that were "false teachings," and for extra credit, identify any of these beliefs that may be present in certain denominations today.