Well I've had word that IAG SP2 Update 3 should be out in a month or so.
The components being addressed with this update, are that Windows 7 will be recognised correctly and 64-bit clients will be supported.
Obviously you have seen that I have documented a 32-bit Windows 7 workaround, but there are still issues with this when using certain applications. The only 64-bit client that can be made work is Windows 7, as long as your computer has the ability to run XP Compatibility Mode (which will mean that only specific processors are supported)
As soon as I see that update, I will get it installed and tested, as my work laptop is both Windows 7 and 64-bit..... you can see I like a challenge!!