Progress on phoning in twittergrams
Friday, June 29, 2007 by Dave Winer.
Roger Strickland has a bare-bones system working. 
I just called his service on my Blackberry, and recorded a Twittergram, and it was posted through the web service to Twitter. Yehi!!
The number to call is 888-281-3613. Don't talk too long (remember there's a 200K limit). Hang up when you're done.
Others are working in this area as well, but Roger was the first to break through with working functionality.
I'll be leaving a voice TwitterGram from my iPhone, with any luck, in less than an hour.
