Im new to this forum just wanted to say hi and am currently building a HTPC utilzing media portal.
The sirius plugin for MP would be great but I did find an alternative way to get this to work.. sort of
Yahoo has a widget for Sirius that saves your credentials and does not promt for a CAPTCHA code. http://widgets.yahoo.com/gallery/?search=siriu
After installing this it will prompt you to update the player.
I have media portal launching this widget as an external program using the "MY Programs" plugin and currently trying to figure out how I can control the widget with my MCE remote. When active it sits on top of MP.
Hopefully this can jumpstart a plugin developer to create on for MP. I did read through this thread and it appeard the CAPTCHA code was a main issue.