I did not whiteboard with remote interviewers on xoom - but I strongly recommend turning the TV+Camera towards the whiteboard and starting with high level requirements and system design diagram rather than describing things verbally. Interview itself is easy simply because very few specific questions are asked. But eventually tough if you said less or no deep experience with the technologies sought after there. Distributed systems, DHT, Memcached, Redis, Kafka, Zookeeper, etc.