There's something odd with my memory, as I thought I read about it on here before. I seem to remember nearly posting a reply*, that it seemed to work very much like a conference room facility, which people could set up elsewhere for themselves anyway and I even thought of jokingly suggesting a PPGSM one
Or am I thinking of another service? Apologies for not posting Rebtel here then.
There is discussion of it on Niftylist forums, in which, errr, I um ......... well read it
I think that petkow there (who has joined here) has been a bit disappointed with Rebtel. Sometimes you end up paying for calls to mobiles when you didn't expect to, and so on
http://niftylist.co.uk/forum/index.php?topic=1536.0
In the end I suggested using Sipbroker and free conference room facility from Sipphone (choice of 10 million)
* looks like Stan put it here first! ..... and I did reply