It's still slow as ever. I hate the log in process as it has to refresh the whole page as it goes to https. They could have easily done it simpler (look at how Qantas does it).
The new MMB is a nice step up from the old showing the allowance, chauffeur drive, seats and special meals without having to search for it. Excellent improvement.
One feature I still miss from their pre 2007 website is the ability to select seats when selecting flights during the booking process (not after paying/booking etc). That was neat (EY does this).