How nice, finally the concept of disposable leaves the e-mail world. In Israel there was a time when one credit company provided disposable credit card numbers, but it didn't take off.
Now the US based http://www.jangl.com offers disposable phone numbers.
At this moment they offer only US numbers (:cry:).
Also, while in beta, the service is free.
Here's how it works:
1) User A registers by calling the company (suddenly Spamgourmet's verification system looks so admirable...).
2) User A gives user B an on demand disposable phone number.
3) User B calls it (costs like a local call - too bad a local call could cost money in places that aren't the US though...).
If it's the first time, user B would have to record a voice message and user A would hear it and could choose to accept or hang up.
From then on, it would just be a direct number to user A.
4) ...or to user B, if user A is the one that calls it. Yes, it's impossible with an e-mail address I guess, but a phone number could be bi-directional.
So basically it's like Spamgourmet for phone numbers.
Any chance Spamgourmet would enter the phone calls' world and provide a free solution? At least the offline spammers (telemarketers and polls' conductors) couldn't use DOS on you...