It's true. My favorite Filofax form -- the Project Planner -- is discontinued. I exchanged email with a really nice man at Madison Signatures, who contacted Filofax in England and confirmed that they have none left in their warehouse. He has one packet left (A5) and is holding it for me. I obtained a packet from a place in Florida earlier this year. They, too, sent me the last one they had.
The Project Planner form is so stone-cold dead that I can't even find a picture of it online to post here. Since I haven't found any project forms in the DIY Planner that I like as well, I'm going to try to print my own on plain A5 paper, probably from Word or Excel. (Now that's DIY!) Luckily, it's a very simple form, which is exactly why I like it.
I also think I've found out the reason for the discontinuance. Filofax has developed some new forms, and a time-management training program to go with them. The replacement form appears to be called Project/Mind. I actually like the looks of this new set of forms, called Professional System, but I don't think these forms are available in the States yet.
Another alternative is this project form developed by a company called DeVilliers. Again, they seem to be available only from U.K. Web sites, so if you're not in the U.K., shipping charges can be a drawback.