Now that the date is set for May 28th, Orange has also released info on their iPad 3G data rates.  They offer a pay as you go $1 a day, weekly pricing, and monthly pricing.  Sorry folks no unlimited data options.  You will be capped at 10GB a month.

Orange’s rates are somewhat higher than AT&T but that is expected as AT&T supposedly made a deal with Apple to lower their rates to keep the iPad on their network.

You can preorder your 3G service on May 10th (same day you can preorder the iPad) at http://orange.co.uk/iPad

Orange will also have 3G service in France, Spain and Switzerland, and others later this year.