Roku needs to sit down with YouTube and iron something out.
So far, that is my only disappointment with Roku: no YouTube.
I am able to get youtube on my roku thru video buzz:
We have the Boxee box which has a YouTube app. We like it so far.
You can get YouTube on your Roku via the Raterix app.
I bought a Roku back in August and shortly afterwards cancelled my $100/mo. "250 Channels of CRAP" DirecTV Service. My family hasn't looked back.
I have Hulu and Netflix subscriptions (total $16) to watch what I want and I have an Over-The-Air HDTV antenna for everything else.
As for YouTube, my kids watch that on their laptops primarily anyway, and personally I don't understand why anyone would want the crap from youtube on their TV.
If you're anything like my house, we have the Roku, Wii and XBox consoles hooked up to the TV's. If the kids want youtube on the TV they use the WII or XBox consoles.
No shortage of entertainment choices in my house now that DirecTV is gone. I've saved $84/mo. and everyone's happy. ($100 DirecTV bill - $16 for Hulu & Netflix subscriptions.)