Finally, Japan gets the stiffest deal of all with iPads there officially confirmed to be SIM-locked to Softbank Mobile's network, something that has already earned plenty of ire from the local populace. The carrier does offer a variety of monthly payment plans for obtaining your tablet, though its data tariffs are nothing special: ¥2,910 ($32) for a month's unlimited use if you sign up to what seems like a longer-term plan, or ¥4,410 ($48) for a 1GB allowance if you go pre-paid. There's a third option for spendthrifts, costing ¥1,510 ($16) for 100MB pre-paid, but that's not even enough for you to watch a full Engadget Show, so we'd probably advise against it. You can find price breakdowns for each country after the break.
Update: Rogers has killed that lovely third option shown in the image above. Hope you weren't excited about it.
Update 2: Turns out Apple had the wrong details about Vodafone UK too -- you get 1GB of data if you spend £10 a month. [Thanks, Rob]
Update 3: Movistar, Telefonica's consumer arm in Spain, has announced a pretty stonking deal: if you already have a smartphone data plan costing €25 a month, you can get a Micro SIM and 3G data on your iPad for free. Espana totally just won the "best place to own an iPad" contest.
Update 4 (12 May): The perpetually-emailing Steve Jobs has apparently chimed in to say Japan's iPad 3Gs accept international SIMs, so feel free to pick one up and take home on your next trip to Fukuoka. [Thanks, David]