Yes, a universal remote will work with the product, however, it will not do what you want it to do. I have tried this myself. I was able to connect a Logitech Harmony universal remote to the tv and it works, but it still will not let you go directly to a channel by typing the number (i.e. if you type in 52, it will not take you to channel 52). This is a built in feature of the television, so no remote will help. I asked at Best Buy and that is what they told me.
The only thing that I know of that will help a little bit is when you are scrolling through the channels, you can press the "fast forward" or "rewind" button on the Roku remote and it will take you forward or backward several channels at a time instead of one channel at a time. This isn't a perfect solution, but it makes it a little better. You can go from channel 1 to channel 8 all at once instead of having to go one by one.