Shred what is your location in Jhb? I am situated on the west rand, I get pathetic speeds
however I am in a suitable position that allows me to still search on google etc. My current (12.12.2010) balance on my 2GB monthly contract is 1412.27 GB which means I have used +/- 600GB since the beginning of the month (12 days ago), this has been achieved using an edge connection.
You could be right and assume that not all of Jhb will have 3G speeds come the end of February, however I have it on good authority that I will have 3G speeds as the tower in my neighbourhood is being upgraded.
2GB suits my needs even at edge speeds (I would like 3G speeds though to be honest) and at the price of R41.63 per GB makes the offer light on my wallet.