YouTube Speed Test
YouTube has a pretty cool utility that is probably not known:
The YouTube video speed history shows the past video speeds of YouTube videos you watched from your location (your current browser at your current IP address). It also shows aggregate video speed by other users in your city, state, country, and worldwide.
t your Internet speed right now:
http://www.youtube.com/my_speed
Very useful information on how Internet is over the past 30 days and how it compares to the national average.