You could use IPV6 addresses however, you would only probably be able to post to IPV6 sites. No IPv4 sites? I am pretty sure on that one as IPv6 is still not as implemented as IPv4 by any means. I am trying to learn as much as I can about IPv6, as it is quite a bit different from IPv4. They really didn't cover IPv6 in my CCNA class when I took it 2 years ago. I know you can setup a tunnel broker like HE but it will require you to get your own router CISCO, Juniper, etc, etc, I am going to try Vyatta personally. I have been using it now in VM with very good results on my IPv4 network, haven't made the change to IPv6 yet though. tunnel broker would tunnel your IPv6 addresses through the IPv4 address somehow. When IPv6 is widely implemented it will be a scrapebox marketers dream it will be very hard to block if not impossible to block all those ips lol.