Legality
2 things on it being legal or not.
1. There has never been a specific law that prohibits Wi-Fi usage across public boundaries.
The Telecommunications Act of 1976 pretty much prohibits you from using tincans and a piece of string to communicate with your neighbour, UNLESS you have a license.
You can always apply for a license, but it's overkill considering how cheap hardware is these days. In 1976 you would have needed some fairly serious hardware to setup a network with your office.
2. The good news is that with the new Electronic Communications Bill you will no longer need a license for communications in the 2.4 GHz spectrum. (wi-fi, baby monitors, cordless phones)
Using Wi-Fi to connect to your office is far less dangerous than speeding in any case, and if it means you'll be more productive, then it's a bonus to the country's economy
3. Okay, there's a third thing: It seems that for some reason in South Africa we've been sucessfully brainwashed by Telkom to think that anything that might eat into their profits is 'illegal'. Most countries things start out as being 'legal' before someone would come along and impose restrictions. For some reason, we have restrictions on technologies that don't even exist yet because of antiquated laws.
When last was someone prosecuted for 'illegal Wi-Fi usage'? Let all of us stop telling new Wi-Fi users it's illegal, because all we're doing is playing into Telkom's hands and further screwing ourselves and our economy. If someone asks, tell them about the new Electronic Communications Bill (ECB) that will soon be ratified, not the 1976 Telecommunications Act. Sorry to all the lawyers out there, but we're closer to the 2006 ECB by about 30 years.
Yeah! Fi!
*UPDATE* - The bill has already been ratified and approved by parliament. All that's still needed is the President's signature. You can download the bill in PDF format at
http://www.icasa.org.za/Documents.aspx?Page=105