Please do not see this as me taking up for Symantec but let me offer some rational.
First you really don't HAVE to use Windows 7, it's just that it has RTM'ed and everyone wants to use the new thing. Use Vista or XP (yes I know eveyone has reservations about those 2 OS's and Win 7 IS pretty cool), if you are that worried about your antivirus.
I noticed everyone aying they upgraded to Win 7, but as I look at the PC manufactures websites of the 3 majors (Dell, HP, Lenovo), Lenovo is the only one offering Windows 7 drivers. Sure using an older Vista driver will work, but I still notice some problems. But I don't expect to see Vista drivers widley available until around the public release.
Sure you can talk to your AM and you can threaten to leave, but there is a cost associated with leaving and going with the McAfee or whoever, not to mention the reasons your orginization choose NOT to go with the others in the first place. Also who says that the other Anti-Virus product makers have their product up to spec for Win 7? So you leave Symantec and go to product X and find out oh this piece causes this problem or it's more work to setup rules and options, or one of their options is an all or nothing where with Symantec you can selet individualy, etc, etc.
This reminds me of when everyone was saying thye didn't like Vista cause it didn't have drivers for their old hardware, I'm like isn't that your hardware vendor's fault not Microsoft's?
I honestly do not think Symantec wil wait until the end of November to fix the problem but who knows, only time will tell. I remember when you couldn't install SEP on Win 7 the normal way (Win 7 RC1 release). But I just wanted to offer and opinion looking at the other side of the coin. I know our lovely MICROWAVE GENERATION, and they want it NOW!! Just push it out and if does not work 100% just patch it, after we complain about how you released it too early...LOL