yep, since last year - here's what to do to qualify for free line install / upgrade to adsl
1. Call telkom and tell them you want a line installed - DO NOT MENTION ADSL at all
2. Once the Telkom tech has finished the install and left your home, and the line is active call telkom again and have them upgrade the line to ADSL.
should be now done with little fuss and at no cost to you. you can then choose your call tariff plan (ie Closer 1,2,3 etc) or if you don't want the line for voice calls at all, have it stripped down to the cheapest tariff plan (R131 p/month I think).
Just remember, R131 (Telkom voice line rental) + R152 (384 Line - Cheapest) will be the standard should you choose to take your adsl line rental via Telkom. The voice line rental is compulsory at the moment. Oh, and those prices are excl VAT.
Hope this helps.
R