Hi jaycintay,
I still havne't received a letter of offer or more info on GS.
The process so far (for me) has been:
I was told on the day that I was successful,
I received an email a day later confirming GS on July 18th (I double checked, it will be a Wednesday!). The email stated that a Letter of Offer and further details of GS would be provided after successful reference checks.
I received an email and a voicemail a couple of days later from Altara with a request for my referee details (I provided this on the day, but they couldn't find it) I emailed the info to them, and one of my referees (my manager of 3.5 years) received a call the next day and she gave what she called a 'glowing' reference
My other referee was my mananger back in 06-07, so I figured they might not call her.
...and nothing else so far!