I get that startups need to move fast in order to validate ideas, but redis is hardly a chore to set up.
Either way, congrats on the redundancy.
This is a very valid comment, we always recommend having your Redis server as close as possible to your application server. We're following the lead from Heroku, which offered this Alpha feature for Postgress in US-WEST https://status.heroku.com/incidents/460 .
We've been offering custom HA (master, slave setups) for a while. This is the first step towards giving our customers more choice for their availability zones.
Redis 2.6 Sentinel is exciting development and something that we're experimenting with now it's in the latest Redis release.
Feel free to send me any questions to firstname.lastname@example.org