Use Visualforce and Apex to Populate PDF Forms

Somehow I missed this post on generating PDFs, but in addition creating PDFs from scratch using Apex, you can also populate third-party forms (IRS forms for instance) using Adobe's XFDF format.

We are currently using Telerik's .NET Reporting services (C#/ASP.NET) but this may be another route to investigate depending upon how much control this provides the developer.