I make no claim that the list is comprehensive and there is undoubtedly some overlap, and nowhere do I say we should only fight one and not others. But determining where the danger is greatest, i.e., which has the most "suppliers," which is easier to "treat," etc., can have some strategic value. Also, I'm sure that not everyone here would necessarily consider all of these views heretical. I feel that all of them are dangerous and threatening, but I have a hard time determining which are the most; that is why I wanted to gauge opinion here --- this is not a scientific poll. Though it taxes my ability to summarize, here's a basic rundown on three that people have asked questions about:

The Third Wave describes a movement that is basically charismatic, but transcends the older Pentecostal (First Wave) and Charismatic (Second Wave) movements in moving beyond traditionally Pentecostal or Charismatic denominations and churches. The movement teaches that all the miraculous sign gifts recorded in Scripture (any quite a few that are not) are for Christians today (prophecy, tongues, healing, etc.) and that the church's evangelism and mission should be accompanied by signs and wonders. Well known advocates include C. Samuel Storms, Wayne Grudem, and Jack Deere.

Charismatic Chaos - By John MacArthur
http://www.biblebb.com/files/MAC/CHAOS6.HTM

The New Perspective on Paul (or the New Perspective on Justification) is a trend or movement primarily within academic scholarship (though it is moving into evangelical pulpits) that significantly modifies or undermines the traditional Protestant/Reformed understanding of Pauline soteriology, especially justification by faith. Phil Johnson summarizes the following points: The New Perspective 1) Claims that the Judaism prevalent in Paul and Jesus' time was not legalistic and focused on outward obedience or conformity to the Law, 2) Claims that Paul's primary theological emphasis was upon racial reconciliation between Jews and Gentiles rather than individual salvation, 3) Claims that the atonement should primarily be understood in terms of Christ's victory over powers and principalities rather than in terms of substitution or propitiation, 4) Claims that justification by faith primarily concerns membership in the covenant community rather than personal salvation or standing before God. The most well known evangelical associated with this movement is N.T. Wright.

New Perspective on Paul
http://www.monergism.com/thethreshold/articles/topic/new_perspective.html

A Defense of the Old Perspective on Paul by Phil Johnson
http://www.monergism.com/thethreshold/articles/onsite/new_p.html

Open Theism is a theological movement that consistently takes Arminianism to the next level. Since perfect foreknowledge is just as incompatible with libertarian freedom as predestination or foreordination, Open Theists claim that God does not know the future exhaustively, especially with regard to the free choices of individuals.

Open theism
http://www.carm.org/open.htm

Click here: openness ligon duncan
http://www.fpcjackson.org/resources/apologetics/Open%20Theism/duncan.htm