mike: It looks to me the best thing about Zenbu is you get 10 minutes free each time you connect, enough time to check your email, get directions or read some news without ever having to pay.
For now though I'll stick with free Telecom wifi for xtra broadband customers and vodafone 3g for on the road :)
We did some testing to see how to handle the first free data and time. There's not just free time, there are free megabytes too. I forgot to mention that in the comparison with Tomizone. It's not of much value, but it's nice to have available for some people.
We reduced the amount of free data to see just how much trouble people would go to to get a freebie. It's quite a bit of trouble. I think most people are not like Mauricio, uninterested in the cost.
Look at your post for example, loving the free Telecom Wi-Fi. I have enjoyed using it too. It's nice not to be burning up $8 an hour to check a few emails. I think most people are like you and me, rather than Mauricio [in terms of worrying about the cost].
If you want good mobile phone 3G service, you should be using Telecom's EV-DO. It's faster than Vodafone's W-CDMA and also offers much more coverage, as does the regular Telecom cellular service.
Telecom enjoys lower royalties on phones than does Vodafone. Royalties on W-CDMA run at around 12% of the wholesale price of handsets. For CDMA2000, it averages about 4%. So Telecom has some intrinsic advantages over Vodafone. But on the other hand, there are aspects of GSM operation such as SIMs and more roaming internationally, which make GSM more attractive.