FWIW, a stormchaser friend of mine linked the updated NWS stats on the outbreak today. Current count is still two F5, eleven F4 and 21 F3 from a total of 362 confirmed tornadoes between 4/25 and 4/28. Between 8a 4/27 and 8a 4/28 there were 312. Death toll for the three days is at 350, with all but 10 of those on the last day. It dwarfs the 1974 Super Outbreak in terms of total twisters and has now surpassed one-day and two-day death tolls back to 1936 and 1925 respectively.
More at
April 2011 tornado information