This may be a little off the wall and it may be the wrong place to ask, but it seems like the closest match I could find. I looked at the FAQ and searched the site for any previous mention.
There were stories in the news a few month back about how Morse code guys blew away people who were thumbing in messages. My thought was that this would be due to having multiple letters per key and also having to wait when using consecutive letters that are on the same key.
It seems to me that it shouldn't be to difficult for a developer to write an application that would let use Morse code on their phones. Any key on the left for dot and any key on the right for dash, for instance.
Just a thought.