I'm not sure what you mean by "rio ed2k". Could you please provide more context or clarify your question? Here are a few possibilities:

1. Are you asking about ED2K (a file sharing network) in relation to Rio, a company that made MP3 players?

2. Do you want information about the ED2K protocol and its use in Rio de Janeiro?

3. Are you referring to some specific software or application called "Rio ED2K"?

4. Is this a typo or abbreviation for something else?

If you can provide more details about what you're looking for, I'd be happy to help answer your question more accurately.