Tecknojock
Keeping the world running
Nope.
MIrc and Icechat are examples of downloadable IRC clients. Normally speaking, you can access it through any browser by clicking on the link nes-chat.tk, and then you can use #nes through the embedded client Mibbit, but that doesn't seem to be working at the moment.
If someone will post a god link for #NES, I will edit it into the FAQ.
EDIT: Xpost with above. Should that post ^^^ be added to the FAQ?