I created a blog category for Func-eval (aka Property Evaluation), and I updated some of my old posts to be in this category.

And while I'm at it, some other func-eval blog entries:
GreggM on Func-eval and Winforms
SteveJS on Nested Break States (stopping mid func-eval)

Update: Very *Evil* things you can do with funceval:
1. Funceval a message pump
2. Inject arbitrary code into another process.
3. Other evil things with FE

Here's what's involved for a debugger author to consume func-eval as part of inspection.