Hi edward mindreantre,
Thanks for the great plugin, it does a great job. I've only noticed one minor issue. If you could fix that, I'd be happy to support/donate your plugin.
I've recent WP MU setup (http://wp.skawa.hu), with 2 sites, each with a primary domain set (overridden) via mu-domain:
Now if I make a new post to blog.otthonrol.hu (http://blog.otthonrol.hu/2012/04/16/otthonrol-ih-ra-is-kikuldve/), it gets listed properly, all is fine.
Could you please fix this? It would important because this guid-like permalink is spreaded by facebook-plugins, twitter, etc.