I tried last night, after midnight or so, and could not get on. Tried again this morning and again just now and failed both times.
What's annoying is that it says at the menu screen that it is connected, then after I play a song is says I won't get Blitz cred because the connection was lost. Then it boots me back to the menu to start over. I just wish it wouldn't trick me at the menu screen and wait until I play a whole song before going "ha ha nope" like that.