Zango is listed as "Adware" by Symantec and a "Potentially Unwanted Product" by McAfee.
Contents

[link|http://en.wikipedia.org/wiki/Zango|http://en.wikipedia.org/wiki/Zango]

I bet they're testing the waters.

I remember dealing with my wife installing Hotbar in probably the late 90's - what a mess that was.