Until this actually happens for DigitalOcean, if you want to mess around with FreeBSD right away, you should just check out the Atlantic.net $.99 a month Go Plan.
"In regards to FreeBSD, we’ve begun the work necessary to get it supported in DO. We’ve already begun testing it internally and hope to launch within the next 2 months."
I would definitely sign up for a FreeBSD droplet, I haven't found a *BSD VPS anywhere near what I'm paying comparable to the specs of a couple OpenVZ Debian GNU/Linux nodes (512MB Ram/50Gb Disk/2TB net) $15/yr. I would hope OpenBSD adoption would soon follow to host many of my services in a more default hardened OS.
I used to have a Linux VM on DigitalOcean. At times it became unreachable, there were some downtimes here and there. I decided to go back to FreeBSD (I used to have a FreeBSD VM on John Companies), and did some research. Vultr.com came up at the top, so I moved to them. Two months in, so far so good.