We're glad to say that IPv6 is under development. However, there is no ETA available currently, beta access is set for October 2013. See http://digitalocean.uservoice.com/forums/136585-digital-ocean/suggestions/2639897-ipv6-addresses
IPv6 is now available in our SGP1 datacenter. Check out the announcement for more info and future plans:
And here's how it enable it:
IPv6 is the most recent version of the IP protocol that the entire internet relies on to connect to other locations. DigitalOcean now offers IPv6 addresses in select datacenters. In this guide, we will show you how to enable IPv6 on your Droplets in datacenters that support it.