App for organizing your desktop icons?

Does anyone know if there is an app available that will allow me to lump my icons into files? I would like to be able to have everything categorized together so I don't have to hunt. I tried just moving the icons around so that everything is arranged onto the different pages but that just isn't suiting my OCD needs (LOL).

Thanks!

I believe the new operating system OS4 will have folders, I am looking forward to that myself.

If you are jailbroken you can use Categories and Categories SB, but otherwise you have to wait until iOS

Didn't know that you can already jailbreak the iPad(?)

Since about day one