Just as a side-note, for those with cPanel/WHM - after speaking with one of their developers, it's most likely going to be the third quarter of 2013 before SNI makes its way in (no guarantees), so if you're needing extra IP's for SSL certificates, it's going to be a while. DO is great, but I wish this wasn't a limitation (primarily due to the below).
IPv6 is planned, but IPv6 is, sadly, effectively useless until everyone can make use of and access it and to do that, ISP's need to step up and start showing some initiative as most ISP's haven't rolled out IPv6 capabilities or updated their customers with newer modems that are capable of accessing it.
I know it's due to limitations Moisey, though so many data centers are freely more than happy to give them out, as long as there's 100% justification. I know it can be a pain, though IPv6 isn't widely supported and SNI isn't fully supported at all.