I haven't bothered using component out of my HD-A2 or BD30 because both are quite far away from the 990 (too long for existing component cables I have on hand) and because it offers no advantages for me.

The 990's DVI switching is entirely independent of the analog video switching (component, s-video, and composite), which is why I have both component and DVI connections from the 990 to my HDTV. I need the component connection for my old DVD recorder and the SMS-1.