No, I wouldn't say there are any resources that would be specific to this. As Roku channels go, it's pretty simple. The tough part was figuring out the interface to weather.gov. There are plenty of generic Roku samples on github, but they tend to be audio/video and UI related. I'm going to have to rewrite this screensaver by the end of the year since it uses the old SDK which is (may be?) going away.
I also created this channel
that has satellite and radar loops. I've never been real happy with its performance and I really need to rewrite it as well. Also, the GOES East satellite has gone AWOL.
These kind of channels are more closely related to game development on Roku than the usual video channels.