We still have free will.
Freedom to sin or to be obedient to God.
I'm probably only one of a handful of FReepers who believes this, but Paul is talking in the present tense here, not talking about his pre-Salvation life:
Romans 7:15For I do not understand my own actions. For I do not do what I want, but I do the very thing I hate. 16Now if I do what I do not want, I agree with the law, that it is good. 17So now it is no longer I who do it, but sin that dwells within me. 18For I know that nothing good dwells in me, that is, in my flesh. For I have the desire to do what is right, but not the ability to carry it out. 19For I do not do the good I want, but the evil I do not want is what I keep on doing. 20Now if I do what I do not want, it is no longer I who do it, but sin that dwells within me.
Find me one person who is obedient to God and that person doesn't need a Savior.