I am currently using activepdf. It is a actually quite a powerful tool. I would highly recommend it. For a quick solution, it is great. Considering I lacked the time to develop my own pdf generator, this was the answer for me. Plus, I do not think I could have incorporated so many nice features. Simple stuff like being able to pull all the form field names out of the pdf template that you. You probably only need the ToolKit.
If you have any questions regard the use of this tool, please feel free to ask. Ben