Just a data point, not working for me in Portland, OR. I'm on a BWC account, using wap.voicestream.com for TCP.
FWIW, I've posted about this on one of my sites,
www.tinyscreenfuls.com, and tried to get as many other gadget and tech sites as possible to link to it, to raise awareness about the issue. Hopefully, we can make T-Mobile sit up, notice, and do the right thing.
Josh Bancroft