From the article:
“Over the weekend we came up with the idea of a speak-to-tweet service –
the ability for anyone to tweet using just a voice connection. … [A]nyone
can tweet by simply leaving a voicemail on one of these international phone
numbers
(+16504194196 or +390662207294 or +97316199855)and the service will instantly tweet the message using the hashtag #egypt.
People can listen to the messages by dialing the same phone numbers or
going to twitter.com/speak2tweet.”
Most of the messages are not in English, but here are some that are: