If you go to Wallst.net, you can search the audio archives and see that Zap used to participate in the site, too, back in 2004 and 2005. Guess whatever benefits WallSt.net promises weren't enough to keep Zap coming back.
Paid announcements on investment sites aside, ZENN NEVs could be a good fit for some people. You can learn more about them in this video. For all the other news AutoblogGreen has covered about ZENN - with no money changing hands anywhere - click here.