I agree with Anakin, some good ideas here.
My 2c worth:
As long as Telkom controls intl links, intl bandwidth will be very expensive. As such p2p, gaming and all other kinds of Net traffic that cannot be proxied will be the biggest bandwidth suckers. I am in favour of a model like that proposed by ChezAnwyne, but with a few modifications.
IBurst should work the same way as any other utility (eg. water and electricity).
You get a smallish free portion for a minimum fee, and then you pay for what you use above that.
Lets face it most leechers are not the richest ppl, so straight away you have a handle on them.
Additionally, as Perdition rightly mentioned, the usage is paid for in arrears - no pre-paid model.
International should be distinguished from local and both should be billed a differing rates - I would think international should be priced at least 3 x what local costs.
Local should be cheap!
So, you structure two distinct offerings - Home and Business - exactly as Grubman mentioned.
You pay a monthly base subscription for each product, say:
Home: R300 p/m. You get 1GB international and 2GB local free.
Business: R450 p/m. you get the same free bandwidth as Home package, but remember you're getting static IPs, better contention.
Then for bandwidth you charge per MB rounded down.
International: 1GB at R75 p/m
Local: 1GB at R25 p/m
This way you are giving the users full control over what they want to do with iBurst. Leechers can leech to their hearts content if their pockets are deep enough. Gamers can play whereever they want, at a cost that suits them.
I mean R600 could be spent in a variety of ways using the above model:
R600 = 3.67GB intl/6GB local OR
R600 = 1GB intl/14GB local OR
R600 = 5GB intl/2GB local etc etc
Most importantly you capture the "low power" internet users that just want fast email and browsing with a cheap starter base (R300).
Additionally iBurst should offer email and all that other crap as value added products that you pay for. So for R300 on Home package, one gets a data connection to the Internet full stop.
The reason I say this is that usually email and web hosting etc are the places where an ISP gets the most hassles and has to provide the most support.
By seperating email etc out as value adds, iBurst can have a seperate revenue stream to pay towards call centre support etc. Also power users like me, who dont want or need email, can get the bare product we want.
To me its all about options. The more options iBurst adds - at seperate cost - the better they can finance their services.
Sentech made a BIG mistake by trying to offer everything in one fee. Look where they ended up. I really think by using a utility style pricing model iBurst can be a success.
Oh and the final thing iBurst MUST NOT, UNDER ANY CIRCUMSTANCES DO is SHAPE the products. Shaping is going to alienate a lot of your power users (p2p, gamers, stock traders etc).
I would rather pay more per GB than be shaped.
<font color="blue">Telkom needs a leash, ICASA needs some guts, and the </font id="blue"><font color="red">SA consumer</font id="red"><font color="blue"> needs to make it happen</font id="blue">