Do I need an HDHomeRun Device if only recording Hulu Plus?

I don't want/need to record cable or OTA. I only really need to record Hulu Streaming to FreeNAS.

Do I still need an HDHomeRun device?

No. However, Channels' DVR/TVE integration doesn't support all of the channels that you may receive from Hulu.

Is there a list of the ones that are supported? I'm specifically trying to record Mavs games on Fox Sports West.

Hulu shows that they support Fox Sports using TVE on link above.

This list was current in January. I no longer have it now but this list provides the channels you get with Hulu + Live