Hi Luke!
Glad you are enjoying Hashnode. :) We do have an ethereum node on Hashnode. It's very new and isn't searchable yet. We are going to whitelist it and promote it a lot more in coming days. Also, we are going to have AMAs related to Ethereum, blockchain technologies etc very soon.
If you would like to manage the Ethereum node and customize it, feel free to let me know. I'll add you to the managers' list.