My previous HDTV to Slingbox experience was not positive. The components and HDMI outputs did not work simultaneously on the Comcast SA 8300HD DVR. I am very happy to report that the Directv HR20 DVR component and HDMI outputs work simultaneously. I can now use the Slingbox player even if my Sony KDL46XBR2 in on.
I can also report that SlingPlayer is working well on my new Thinkpad X60 Tablet with Windows Vista Business.