1 Core on DO gets about 70-80 kh/s.
8 Cores ~ 630 kh/s.

e.g.
[2013-02-06 12:06:46] thread 1: 787919 hashes, 81.58 khash/s

This guide was published before the keccak cudaminer was available. Unfortunately the initial launch failed but the cpuminer source was officially released, which gives GPU miners advantage due to the cudaminer update.

I for one definitely cloud mine MAX as soon as available -- nobody knows whether the gpu miner implementation will work flawlessly as is right after launch.