AT&T announced some changes to the iPhone data plans, but iPad 3G owners are affected, too: AT&T is doing away with the $30/month unlimited data plan. Instead you'll pay $25/month for 2GB:

For new iPad customers, the $25 per month 2 GB plan will replace the existing $29.99 unlimited plan. iPad customers will continue to pre-pay for their wireless data plan and no contract is required. Existing iPad customers who have the $29.99 per month unlimited plan can keep that plan or switch to the new $25 per month plan with 2 GB of data.


The new data plan will kick in on June 7, but the good news is that folks who have the unlimited plan before that time can grandfather it. [PR Newsswire]

See how to check your monthly AT&T data usage here.