The WSUS team briefly mentioned that the Firewall Client for ISA Server has now been added as a new product under the ISA category. This will allow Microsoft and you to control the updates of this product as and when required.
I’ve personally not seen anyone in Ireland (that is not using SBS or a single server) that is using ISA as a firewall. So, it goes without saying, that I’ve not seen the Firewall Client being used outside of a lab environment. Even then, I prefer to keep things simple and not use it.
The team also mentions that SMS 2003 and Visual Studio have been added. More sub categories will be added to VS. The SMS category includes SP2 for SMS 2003, something you will need to go to 2003 R2 and maybe for CM 2007 compatibility. The category is also there to support swusscan2.cab. This will allow SMS 2003 Inventory Tool for Microsoft Updates to detect and deploy updates for SMS 2003.
Speaking of SMS 2003 R2: check out my documents/guides/whitepapers on the Inventory Tool for Custom Updates and the Scan Tool for Vulnerability Assessment.