Haven't been here for a while. Not sure if someone else has mentioned this (if yes, pls ignore this).
Yes, the Twin Durian is having an Open House this weekend. 28-29 Sep 2002 from 10.00am to 7.00pm.
"Catch FREE live performances from local artists such as T'ang Quartet, Sri Mahligai, Budak Pantai and many more in the venues. Win Opening Festival tickets, Esplanade limited-edition merchandise, Esplanade Mall vouchers when your favourite MediaCorp DJs quiz you about Singapore's latest landmark."
I hope photo taking is allowed. I am checking with the source currently.