Ok, so what can this program do? You got a nice, long-winded text review above. So, let's see some pictures!

Here's an original of mine I'll use for this to start with:
I took this years ago and never did anything with it. Then, a year or so ago, I found the old negatives, scanned them into the computer and touched things up a bit. This is one of the pictures I use when I'm testing filter making.

Here's an image done up with a filter I made. The filter name is 'Fall Colors'. It was made based using one of Danny Raphael's images posted in the art forum, and that's where I got the idea for the filter name:

And, here's another using a different filter. This is also a filter I made. It's called 'Lab Experiment' and is based on L.a.b. components within FF:

The number and type of filters one can make is nearly infinite. And add one to infinite to get the number of possible effects one can apply to another image.