Post by Cara PeckensRyan – What authentication method are you using? I was able to implement single-sign-on using Shibboleth and used http://wordpress.org/plugins/shibboleth/ as the core for my plugin code.
I'm using OAuth as both a client and a provider.
Also, keep in mind with the Shibboleth plugin that it hasn't been
updated for a long time (although, I'd trust mitcho's code enough to run
it regardless), so it may not be using current best practices.
(As a completely off-topic note, it appears that your email client
renames the subject of the email, which completely breaks threading for me.)
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Ryan McCue
<http://ryanmccue.info/>