While digging for the latest on IE9 support, I came across this update to MOS Article ID 1307383.1:
Update December 2011:
We currently support IE9 for Standard Interactivity based applications on 8.1 and above.
We will support IE9 for High Interactivity applications on Siebel 8.1/8.2 starting with innovation pack 2012 next year (current target is September/October 2012, but this is subject to change)
So a Q3 / Q4 release for Innovation Pack 2012 and, presumably, Open UI. Here’s hoping that date doesn’t slip too far towards the end of the year. I also wonder if Open UI will introduce ‘HI’ support for non IE browsers? Guess we’ll have to wait and see.