No? It's still advertised by T-Mobile, same page it's always been on (halfway down): http://prepaid-phones.t-mobile.com/prepaid-plans

It should be in the plan list when you activate a SIM at http://prepaid-phones.t-mobile.com/prepaid-activate. It was never advertised available in-store, only online.

I was just on the T-Mobile website earlier today, it's still there, but it's not at all convenient to get to.