This topic was hanging for a while, but I decided to resurrect it. I have recently built a library that solves a purpose of simple HTML to PDF conversion(under MIT license):
https://github.com/marisvigulis/iPDFGen

It has a pixel perfect HTML to PDF conversion and supports a several providers that performs a PDF creation.

Btw, I have a plan to resurrect a iTextSharp fork that was under LGPL license(the one that is free for commercial use).