Steven,

I would suggest using a program installed on the computer to do the posting.  Email posting is a good option, but using a program will let you post to several blogs from one interface, attach posts to categories that are on the blog you are posting on at the moment, etc.

I am using BlogDesk, shareware for the Windows pc.  It supports Wordpress, Movable Type, Drupal, Serendipity, and several more (no blogger though).  I know there is one that is even better for the Mac, but cannot recall it just now.

Check it out.  :Thmbsup:

Brian