Jason,
The Vodacom web site is not letting go of any information, sadly we don't get This Day here, so I couldn't read up on this, however, I might offer a guess.
If Vodacom is to be offering broadband, you can be almost certain it will be 3G based. Expect the same kind of speed and reliability (or lack of both) that you could currently get from Sentech, as they also use UTMS TDD (3G) wireless technology.
The only difference is that Vodacom will probably launch with national coverage instead of just a few limited coverage areas.
Both Vodacom and MTN have in the past let on that they are testing 3G and looking into the possibilities of licensing frequencies for it from ICASA, this might just be the culmination of those efforts into an actual service to compete with Sentech.
Once Vodacom gets this working, expect the other two cellular networks to follow suit quickly.
Willie Viljoen
Web Developer
Adaptive Web Development