• Twitter: Jan 11th was the highest usage day ever (source: @ev via techcrunch)
• Tweetdeck: did 4,143,687 updates on Jan 8, yep 4m. Or, 48 per second (source: Iain Dodsworth / tweetdeck internal data)
• Foursquare: Jan 9th biggest day ever. 1 update or check-in per second (source: twitter and techcrunch)
• Daily Booth: in past 30 days more than 10mm uniques (source: dailybooth internal data)
• Bit.ly: last week was the largest week ever for clicks on bit.ly links. 564m were clicked on in total. On the Jan 6th there were a record of 98m decodes. (1100 clicks every second)

Via John Borthwick: http://ow.ly/XwYF