Yes, I know about the slingbox. Its more and less than I want. Since it down converts to SD its not what I would use to stream the video. It seems like overkill just as a network ir blaster. Also I run Linux, and don't think slingbox has a linux client.
Are there any other solutions? I understand there are ways to control it via USB, though I would like to avoid putting a computer next to the Hr-21 to get it on the network.