Current rumor just seen on SkyNet speculates that AT&T may allow users who have purchased an iPad through this weekend, but not yet received it, sign up for the outgoing unlimited plan over the weekend. Transaction has to be completed before midnight June 6.
AT&T has said if you have unlimited, you'll be able to keep it even when switching to a new device.
This was in reference to the new iphone. I will look for the news release where this was stated. But I'm not sure how you link even if I find it! I've never done it.
You should be pissed, this is the reason many people got the ipad. Looks like new customers only will be excluded.
It was stated again last night, after the iPhone 4 announcement, that you would be able to upgrade to the new phone and keep your existing unlimited plan.