Is it possible to post to to Wordpress blogs at the same time? If so, how do I?

I have two self hosted Wordpress blogs. I have resorted to this as I want to have a mobile version of my site, but making my template mobile compatible is proving very difficult. So my blogs are hosted on mydomain.com and mobile.mydomain.com. I want the content to be syncronised, but for my template to remain as per each site. Is there a way of doing this without copy and paste? I have looked on Google, posted on the Wordpress forums and looked through the Wordpress plugin gallery ... is it possible to syncronise my content between two blogs on the same domain but separate subdomains?