Spam on Yahoo!
From what I gather, it seems to be your personl nai from Yahoo, unless Helio provides one for you.
Check with Helio's tech support.
Maybe you're saying that I should change my Yahoo! ID? That would be disasterous since I'd lose everyone on my friends list and there would be no assurances that I wouldn't get spammed on the new Yahoo! ID either since it looks like this spammer is spamming alot of people on Yahoo!.