A.B.
I bought mine from Best Buy. You can do an ATT data plan wherever you get it from where you pay about $15 for 30 days and it's basically "as needed" vs every month having to pay for a service you may not need. At home, my ipad connects to my wireless network, and out of the house a lot of places have free wifi that it connects into. I've had very little need for my data plan...I've only paid for it twice since June. Don't pay a huge amount for a data plan or sign up for a contract unless you know for sure that's the only way you're going to be connecting.
Also, I bought a case that has a keyboard included in it (about $99 for the case and keyboard unit), and I LOVE being able to type on a regular keyboard vs the ipad.