...well, of limited use if you're not tweeting to the hashtag #egypt, but, even so.....

...from:
http://gizmodo.com/5748203/those-with-limited-internet-access-can-call-these-numbers-to-tweet-egypt-news

Those Without Internet Access Can Call These Numbers to Tweet #Egypt News

Those Without Internet Access Can Call These Numbers to Tweet #Egypt NewsGoogle, Twitter, and voice-messaging company SpeakNow have put their brightest minds together to provide a way for people with limited or no Internet access to tweet about the events occurring in Egypt: @speak2tweet. Here's how it works:

[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. No Internet connection is required. People can listen to the messages by dialing the same phone numbers or going totwitter.com/speak2tweet.

Not even a Twitter account is required to tweet using this service. All you or someone who wants to share news needs to do is pick up a phone, dial the number, and get the words out. [Speak to Tweet via Google]