I think you're right mattat. It's not that Orange have really misled anyone, it's just frustrating for the actual price to be immensly different from the promotional price. It makes you wonder how much money Orange lost by putting on the promotion, that's assuming they did lose money.
If thats the only price orange can afford to charge for GPRS then the phone has been sold with features that aren't economically viable after June. The money lost by orange on the promotional period would be immense, but I doubt this is the case. I believe Orange could offer GPRS cheaper, but it needs to see that it is in its interest to do this. Thats why i'll be using the PAYG GPRS after my June billing date, and that will only be for using Planus SMS. If Orange were to improve their prices, I would probably change.