We haven't much news at this point. The next novel in the Donzalo's Destiny series is months from publication, most probably appearing sometime this fall, and no other projects have official publishing dates right now.
On the subject of the Donzalo novels, we have created a companion site with information about their creation and the world in which they are set. It may be found at: http://donzalosdestiny.wordpress.com/
Incidentally, we also have a store with Arachis Press-related merchandise at: http://www.cafepress.com/insolentlad/8162168 Right now, 'A Mouse Is In the House' tees and other products are available. We hope to add some Donzalo merchandise soon.