Don't forget: you need to register by tomorrow (Sunday), the MLB.tv offer expires on 4/10.
On a related note:
There's also a promo running for a 2-line, 6GB data (each line) for $80 that I switched to yesterday. My wife and I were on the 10GB plan for $100, but only use about 3GB each month. So, I saved $20/month. It still rolls over the unused data, free music and video streaming, international calls/text, etc. I thought that I read somewhere that the offer for this plan will last a week. Just trying to save some people some $, if it works for you.
http://www.t-mobile.com/offer/unlimited-data-story.html
I switched plans online in the morning, and wound up losing my data package completely at some point yesterday. I wasn't able to get that fixed until I got home (didn't want to call them from my cell phone about a cell phone problem). When I talked to customer service, she actually said that it was their screw up and that I had no data plan at the moment! My wife was in St. Louis and couldn't access Google Maps, so that was frustrating. I did get a bill credit for her troubles.
I swear that I don't work for T-Mobile. I actually work for a school district (not CPS).