Slocko, the Media Center Extender is an MS technology. Like the MS Media Center PCs, OEMs like Linksys are their "manufacturing partners" in it. I'd warrant that it's mounted on a specified processor and running firmware primarily licensed from Microsoft, differing only in some logo graphics and external cosmetics (what we call "industrial design") from HP's version. It's not a "compatible product"--it's virtually a MS designed product.
There's much less leeway for product differentiation with these than there are with the MCPCs, where cabinet styles and combinations of peripherals beyond the minimum required can make them more distinctive. These things can't even be as differentiated as Pocket PCs, which themselves are pretty homogenized.
We're marching toward unified user-interfaces for everything, with Microsoft garnering more and more of the public mindshare. I'm not saying that it's necessarily a bad thing; it's certainly good that all automobiles are operated using the same set of basic controls (manual vs automatic transmission not withstanding). It is somewhat dangerous, though, like gradual lose of genetic diversity. It's certainly nothing to gleefully gloat about.
It kind of reminds me of that stupid movie, "Demolition Man". At one point, as they walk into a very fancy restaurant bearing the Taco Bell logo, Sandra Bullock's character explains to Sylvester Stallone's character (who's been frozen for many years) that Taco Bell won the "franchise wars" and now
all restraurants are Taco Bell.
BTW, rlinx, it costs around $300, making an Xbox+MCE for Xbox a much better buy at around $149 for an Xbox and with a couple of bundled games and $79 for the MCE for Xbox kit; $228 altogether. The only disadvantage of the Xbox solution is that you have to actually press the physical "ON" button at the console to start it and, unless it permanently installs the MCE software on the hard drive, possibly switch discs. Xboxes are also not very quiet. On the other hand, you can play many hundreds of games on them, with new ones available every day

.