For the longest time, gravatar.com was having troubles serving up the thousands of icon requests from blogs around the world, but it appears that — for now at least — they’re back up and running at full speed. I’ve just re-enabled display of the icons on Command-Tab, and it doesn’t appear to incur much of a performance hit. I’m glad to see some other images around the place instead of the default Mac “shadowy figure” you get stuck with if you haven’t yet signed up for this great little service.