Hi, I posted this last night and thought I had solved my own problem, but I guess I hadn't.
I am running two installs of WP (one on a sub-domain) that share one user database. That works no problem. I want users to be able to post on either site without logging in again.
I followed these instructions: http://engine.taffel.se/2008/11/18/multiblog-single-login-in-wp-26/ With no success. When I check my cookies, it looks like I am getting the same cookies from both sites.
Am I missing something? The instructions I followed are a bit old, is there anything more recent?