Show me a list of services or websites that provide only an e-mail address and no phone number and you will have your list of untrusted sites. Pretty simple rule I have always used with online transactions.
Not exactly, I've got all my contact details for the net on glbse.com, I COULD give a phone number but it would only be for a mobile in China (do you guys really want that? should I add it?).
I am not saying that since they have a phone number they are indead trust worthy. I am just saying if they do not even list one I do not give them the time of day. If I had a business and was short on customers I'd surely publish one.