Besides producing a file of scrambled text with Dissociated Press, you can generate random sentences by using CONX.
*conx* buffer.
conx database.
conx database that has been previously saved with
M-x conx-save.
conx database.
conx database to a file for future retrieval.
Copy text from a buffer using M-x conx-buffer or M-x conx-region
and then type M-x conx. Output is continuously generated until you
type <^G>. You can save the conx database to a file with
M-x conx-save, which you can retrieve with M-x conx-load.
To clear the database, use M-x conx-init.