See http://www.telecomplus.net/adsl_tariffs.htm , they are charging around R600 for a 512/128K ADSL with unlimited usage! Mauritius is so close to South Africa, I don't think their bandwidth is any cheaper than SA, but they are providing such a service at half the price Telkom is charging!
(Currency converter at http://www.corporateinformation.com/currencyrate.asp?ctry_cod=480)
(Currency converter at http://www.corporateinformation.com/currencyrate.asp?ctry_cod=480)