If my current front end wasn't also a back end and therefore had a cable tuner card in it, I'd be more interested in exploring this. That said, I could investigate more seriously discontinuing using the cable tuner card and just using the HDHomeRun for all my tuning needs. Then my MythTV setup would be crazy distributed.
In fact, for my own edification, let's do a side-by-side comparison...
|Price||$299 USD||$359 USD|
|Processor||1.2 Ghz VIA C7-M||1.6 Ghz Intel Atom Z530|
|Graphics||VIA CX700M2, VGA||DVI|
|RAM||512 MB||1 GB|
|WiFi||802.11bg optional extra||802.11bg standard|
|Storage||4GB Compact Flash||160GB 2.5" SATA|
If you opt for the diskless one for $245 you get a 1.1 Ghz Intel Atom Z510 instead. Not sure if the WiFi chipset is different as well. So if you scrap the storage, you can undercut the cost of a Zonbu Mini considerably. I'm not sure how the Atom compares with the VIA CPU in terms of actual performance.
Interestingly, it seems if you want a device capable of automatically booting when power is restored, you have to order a specific model, the "instant on" one. Sheesh. You'd just make that a BIOS setting and be done with it.
It sounds like the display is something proprietary. Pain.
Sadly the miniSD port doesn't seem to support SDHC, so I guess you'd have to use a USB stick if you wanted to go for a non-rotational-disk-based solution.
It's good that they're up-front about all of this.
Despite some possible short-comings, there's something very appealing about a device small enough to be able to bolt onto the back a TV using a VESA mount, although that would make the integrated IR received kind of pointless, which is a shame. This looks like a device worth keeping an eye on.