Have you heard about Talkster (www.talkster.com)? It's a site where you can make free calls to any phone worldwide.
However, Nigeria is not one of the supported countries. The site has a section for suggesting which country to include, so let us pressure them to include Nigeria. Here is the Country Request form http://www.talkster.com/RequestCountry.aspx
Abeg tell all your friends about it and have them submit the form so that they can include Naija and we can all enjoy free worldwide calls!