Share your experience!
For those who have SI Number in the list but can't update. Problem Solved.
Just go to:
http://www.sonymobile.com/gb/tools/update-service/
Download SUS - Sony Update Software and install it. Just run and "voilá".
If you have any questions just ask me.

It's better you try like that 
yes bro, i have my phones SI number listed... but still nothing but disapointment
I'm on an alternative PC and just trying...
And im on list since the 21th of june! Wish me luck
Sadly not updated
Sorry i can't help. It give any error?