I'll put "us too" here, as we too now assume Redis to be up like our relational store(s) -- Percona MySQL. ~16GB at ~500 ops/s averaged over the last 3 months. We've been running Redis for core features for more than 21 months, and as a store, it has been the most stable and easiest to reason with for what performance we can expect and actually receive. Compared with "non-SQL" setups we deploy, if we were to start from scratch, we'd look to replace ActiveMQ, Solr, and a number of our jobs that we jam through MySQL.

Bravo to antirez and the Redis team.