(This is an update with new data. The previous survey was done on April 2.)

These are the 20 most popular websites in the United States, according to Alexa. In other words, they have tons of visitor traffic. How are they holding up under that pressure? Here you can see the downtime so far in 2007 for each of these 20 websites, as measured by GIGRIB.

Downtime in 2007 for the Alexa top 20 websites

Each site below links to its GIGRIB report page where you can examine their uptime and downtime more closely. You can also see how much the websites’ downtime has increased since April 2.

    Site		Downtime	 Increase
 1  yahoo.com		     0m		no change
 2  google.com		    17m		     10m
 3  myspace.com		 1h 37m		     37m
 4  msn.com		 2h 49m		      4m
 5  youtube.com		 8h 44m		  4h  0m
 6  ebay.com		     7m		      1m
 7  facebook.com	    35m		     10m
 8  wikipedia.org	 2h 35m		     12m
 9  craigslist.org	 1h 27m		     18m
10  live.com		 1h 50m		      2m
11  amazon.com		    27m		      6m
12  aol.com		     3m		no change
13  blogger.com		21h 11m		 16h 24m
14  go.com		     8m		no change
15  cnn.com		    23m		      1m
16  microsoft.com	    13m		no change
17  comcast.net		     7m		      4m
18  megaupload.com	 3h  4m		      new
19  imdb.com		    30m		      1m
20  photobucket.com	 3h 51m		  2h 28m

Flickr.com is no longer in the Alexa US top 20. Megaupload.com is new on the list.

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