I’m just testing Jaxtr, a click-to-call service.
I went through the signup process, which was very simple. After the normal stuff of validating the email address, etc., you have to add a phone number to it. You enter in the phone number then it prompts you to enter in a number when the automated system calls you.
The button below is the default for WordPress. After clicking on it, you’ll see a pop-up with a Flash widget that has some more buttons on it. You can also embed that widget itself onto your page, but WordPress doesn’t allow it. I just put in screen shots.
You can check it out, but I probably won’t answer (I like screening calls).
(This one works.)
(These are just screen shots of the other options.)