On ActiveX control install prompts:

there are a few things I love about the work we did here.  You can now say “Do not install this control and never ask me again.”

Yes! Now I never need to see a prompt for “Install Gator (click here for more information about this fantastic progra...” again. via [KC on Exchange and Outlook]

All my machines already have popup blockers, firewalls as appropriate, and antivirus software. But this "never ask again" feature will make me install XPSP2 on all my machines immediately. (Oh, I installed it on one of my laptops last weekend -- went fine.)