
Kelazan |

This is the best I have seen about warlock pathfinder conversion :
Warlock Witch Archetype
Still need some balancing imo. Some witchfire effects are way too powerful. But if you have time, this is a very good base.
For a more battle oriented warlock, you can use this class witchfire and try to squeeze it in a weird Hexcrafter magus variant.

Oceanshieldwolf |

Master Arminas has a very detailed Warlock thread HERE - it has some cool powers throughout the thread and a link to a hexblade conversion...
Cartmanbeck and some others were involved in another one... Oh, Kelazan already linked it...