Today is launch day for FireFox 3.5, and Mozilla servers are already feeling the strain. You can see just how popular it is with their newly deployed Real-Time Download watcher. They combine a simple spreadsheet view with linegraphs showing downloads over time, with a geographical map that shows the various downloads geolocated across the globe. Currently I see alot of traffic in the US & Europe, with the occasional blip in South America and Asia.
Check it out, see what you find!