It's pretty nice to watch my Sonar videos in the living room.

Do they have their own channel?

Yes they do!

Hello Clint,
Today we have some great news!
Roku support has begun! First up, we’re excited to let you know that our Roku channel is available for use. Read below for information on how to install the  channel and start using it today.
New video player embedded in product pages - Now you can  choose to watch our videos directly on the product page, complete with Notes, Favorites, History and all the settings that you've come to enjoy with the Groove3 stand-alone player. You can browse any product page to check out the new features, or if you prefer to continue using the stand-alone player, click the "Play" button on the upper-right side of the site.
Improved Browsing - We’ve made it easier than ever to find  videos on Groove3. Just click the “Browse Videos” tab at the top of the site and navigate as needed.
Streamlined Product Pages - In addition to the "embedded" player, we’ve redesigned the product pages to bring the most important information to the forefront and provide more detail on the individual videos within a product.

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We’re always looking at ways to innovate here at Groove3 and we’re pleased to announce you can now watch any of our videos on Roku!
All you need to do is follow the link below to log into your Roku.com account and add our channel. This is a public beta available to anyone with a compatible Roku device.
Visit Roku.com and Install Channel
Once you have installed the channel, you can access the Groove3  channel by refreshing  the channels on your Roku home screen by visiting Settings > System update or Settings > Player info and checking for an update. Or, if you prefer to not do that, new channels will generally refresh automatically within 24 hours.
If you have any feedback that you feel will help us improve the Groove3 experience on Roku, please  let us know here.
Thanks for your support!

Good to see them integrate this with Roku.......however, I like to have Sonar open when I'm watching tutorials as I like to test it out at the same time......and I have short term memory if I had to do it later.
 
If this was setup in the bedroom, it would be a great way to put the wife to sleep.  

I am reviving this old thread because recently I noticed that my Roku device no longer scrolls through the entire Groove3 library.  My Roku now scrolls/browses from "AAS" through "Guitars" but then after guitars the "AAS" starts again.  I am using Roku's most recent software 8.1.0 and I have the most recent Roku device.
 
I have reported this the Groove3 and they said that they are investigating it but I have not yet received a fix for this problem.
 
[Edit:  Tony at Groove3 was able to fix this problem; the Browser in the Groove3 Roku Channel now scrolls through their entire Video library.  Thanks Tony for excellent customer/tech support.]