SIPBroker.com allows peering to a variety of networks.
I think it would be a potentially HUGE benefit to have it as an integrated option. People could then choose to use it or not, and would not need messy dial plans for things like SIPPhone and FreeWorldDialUp.
The folks at sipbroker are also working with the folks from e164.org to providse a service called Voxalot , voxalot.com
Has such a feature now been implemented? I have tried with ENUM trunks and Voxalot but still do not know how to correctly pass the peering codes that include '*' codes.