They have APIs to manage on-demand instances as well.
Some key things I saw when I briefly checked it out:
-Their answers  regarding bandwidth bursting and fair bandwidth usage / sharing policies  is slightly ambiguous, or worrisome at least IMO, although maybe I'm just a cynic heh.
-They do include CPU bursting  similar to Linode.
-No private IP addresses . No mention of IPv6 either but perhaps they do support it? =(
-Their 'Features' page looks great but I can't find more specific information & details on some of the things mentioned such as:
A) US & Europe data center; is casually mentioned as being New York & Amsterdam only though.
B) The ability to upgrade a 'Droplet' VM to a dedicated instance that can use all the host resources.
C) No mention of VM resize speed / more info on the 'private network' aspects.
 = https://www.digitalocean.com/community/questions/do-you-limi...
 = https://www.digitalocean.com/community/questions/do-you-have...
 = https://www.digitalocean.com/community/questions/how-does-cp...
 = https://www.digitalocean.com/community/questions/do-you-offe...
Does anyone have any first-hand experience with DigitalOcean that could provide some insight?
I'll probably give it a whirl in the next few days as it looks to be a solid offering; would definitely be interested if anyone that may have gone with them already though!
It provides us with a lot of flexibility on how to build our service.