The Roku Stick, and many phones, use MHL-compatible ports; CEC is the remote-control interface for MHL, but it's the MHL port that is required for a Roku stick.
As far as I can tell, all MHL compatible host devices (e.g. TVs) also support CEC.

On 10/20/2012 10:34 AM, Brian Cluff wrote:
> I think you mean CEC (Consumer Electronics Control) compatible TV instead of MHL (Mobile High-Definition Link) which is the interface to convert the USB on your phone into an HDMI port that understands CEC.
> In that video they are actually demonstrating CEC when they are showing off the remove controlling the phone.
> 
> http://en.wikipedia.org/wiki/Mobile_High-Definition_Link
> 
> http://en.wikipedia.org/wiki/Consumer_Electronics_Control#CEC
> 
> Brian Cluff
> 
> On 10/20/2012 10:03 AM, Joseph Sinclair wrote:
>> Inline:
>>
>> On 10/19/2012 11:16 PM, der.hans wrote:
>>> Am 19. Oct, 2012 schw�tzte Joseph Sinclair so:
>>>
>> <<SNIP>>
>>> MHL means one remote controls both TV and the plugin device? Do you have
>>> to switch back in forth like TV/Sat/DVD/AUX or can you just change
>>> channels or change volume and the correct thing happens?
>> With the MHL connection, the device has no remote control of it's own, everything is controlled by the host device; that includes volume.
>>
>>>
>>> Finally found a video showing a remote with a TV to control a phone over
>>> MHL.
>>>
>>> http://www.youtube.com/watch?v=SmuvzfkyP78
>>>
>>> I don't see him changing volume, but I would think the TV could be kept at
>>> constant volume and changing the phone volume would be sufficient.
>> No, The phone volume has no effect as the output stream is a straight digital content stream.  The TV controls volume.
>>
>>>
>>> What about for the roku stick?
>> Same, the TV does volume, the stick just provides an A/V data stream.
>>
>>>
>>> What about integration with an OTA receiver? Can Roku handle that as a
>>> channel?
>> No, He would switch to (e.g.) HDMI-3 for the Roku, and HDMI-1 for the OTA.  Most TV remotes can make this a single button for each source.
>>
>>>
>>> I need simple. While the person is intelligent, whatever I set up might be
>>> a brand new interface to learn multiple times a day on the bad days.
>> Simple is good, and I have gotten some absolutely technophobic persons to use Roku just fine (as long as I turn on the system; I have a complex turn-on sequence due to having 5 non-integrated devices, something you'll want to avoid), and switching (via single-button) from Roku to OTA is not a problem when I provide a small instruction sheet (3 sentences [for Watch TV, Watch Movies, Turn Off], fits on a 3X5 in 16pt Courier).
>>
>> I should mention that some of the newer "Smart" TV sets have built-in streaming video capability (including viewing any DLNA content on the local net), and that can be made fairly simple to use as well with a bit of remote-control programming.
>>
>>>
>>> ciao,
>>>
>>> der.hans
>> <<SNIP>>
>>
>>
>>
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