This might just be a misprint there on the website. Its very likely that an ajax / javascript application that works on Opera could also work on iPhone Safari. Perhaps they're waiting to test it, or some other confusion led to the misstatement about Opera mobile and iPhone (in the same sentence)
Actually, now that I click through and look at the website:
http://www.soonr.com/web/front/talk.jsp
I see that the errors are just some misunderstandings on the blog page. This is software that you install on your mac or PC. The outbound calls that are conference-called together are between your cell phone and your landline phone (and also a call to the other 2nd party). Its a bit convoluted, but if:
- the other person was a skype user, and
- you were on your night and weekend minutes or had free incoming minutes (like in Europe),
Then the call would basically be free or the cost of calling your cell phone from your landline. to anywhere in the world. Otherwise it would be the cost of your landline charges.
So at most it would cost you skype out minutes; your own landline charges to call your cell phone number and whatever your rate was for incoming call minutes. Is that any clearer?