Note that Michael has posted information in the "What's New" section of LL about Canon now offering a new warranty for printheads for iPF5000 (coincidentally, only a couple of weeks after his printhead failed and he asked for a replacement).
However, I am not too impressed so far with this information, based on two points:
1) As a member of the Wiki posted: "It's interesting that Mr. Reichmann's iPF5000 (PF-01) head died, and Canon replaced it. And then when he suggested that Canon should do something official about the warranty status for these heads, they went right out and made an official statement - that specifically does NOT cover those very heads "
2) My comments after a quick and dirty analysis (HP calculations need to be confirmed, as they are from memory): "The warranty actually isn't that impressive. At 4 picoliters per drop, 10 trillion drops is 2.5 liters. We don't know if the cleanings count in this or not. At $600 for a printhead (unless the PF-3 is cheaper), that works out to head cost of 600/2500 = 24 cents per ml of ink. That is a best case scenario, because if you are a relatively low volume printer, you won't print that much in one year, then your warranty is gone. It could turn that your printhead cost will be 2-3 times this much per ml of ink if you don't print high volume and the printhead fails after 13 months. I don't recall the exact numbers, but I believe I figured something like 5-10 cents per ml as the printhead cost for HP z3100, and I think the heads have a much longer expiration date than one year, plus you can buy two heads for something like $100 (6 heads needed for the whole printer). The total head replacement cost for the HP is about $300 for the printer. Note that the warranty applies to the new PF-03 printheads. The PF-01 printheads in the iPF5000 apparently still have no official warranty. Conclusion: Cost advantage HP by a wide margin."
If anyone cares to do the calculation for HP printheads based on cost, warranty, number of ml heads are guaranteed for, etc. and check my calculations, it would be appreciated.
--John