"Shouldn't we sue them for this?"
Huh? Sue them for not providing something they didn't say would be provided?
The decision to or to not provide DIVX has to do with the cost of licensing through DIVX and price points of players and how many people do or do not use DIVX media. If Panasonic said you'd have DIVX on the BD60 and they didn't provide it, ok, you'd have a point. DIVX is not supported and that is made clear on the product information for the US based models.
The target market and price points for the BD60, 35 for that matter, did not equal having DIVX support.
E.B. White said, "I arise in the morning torn between a desire to improve the world and a desire to enjoy the world. This makes it hard to plan the day."