The Red Cross raised over $1 million for Haiti disaster relief through text messages in less than 24 hours

[Update - 15th January - It's now over $5m via SMS]
[Update - 15th January - now over $10m]
"We’ve just confirmed that the Red Cross has already raised more than $800,000 [later updated to more than $1m) for Haiti through their $10 text message donation initiative (text “Haiti” to 90999), which is backed by the United States State Department."
Source: Mashable, 13th January 2010, with the million landmark confirmed in this tweet by Katie J Stanton, also on on 13th January 2010