Authentication requirements stunting me.... any advice?

[blackcloud]

Trying to use Twitter in an ARG.

Players must be able to text from their mobile phone the secret code
words they discover. Players have dedicated Twitter accounts, and I
want their statuses published with the friend_status call of our
gamemaster's Twitter user name. Authentication requirements prevent me
from doing this. Is there a work around? Any services I should use
instead? Not all their phones are capable of emailing... SMS is
definitely the way to go.

Also, is there documentation beyond this?
http://groups.google.com/group/twitter-development-talk/web/api-documentation
That page doesn't give anything in the way of syntax, and the Talk
Group is flooded with spam... I can't find anything useful.

Thanks!