[mattspitz]

There's this, too.

http://yepthatswhatshesaid.com

It randomly samples tweets for training, but it doesn't write back automatically. If you find one you like on the site, though, you can tweet it.

</shamelessselfpromotion>

[corin_]

Would interest me much more if you open sourced it, are you already decided on not doing so?

edit: I see you do actually have it at https://github.com/mattspitz/yepthatswhatshesaid - is it up to date? Thanks for sharing!