I have had a few small scale blogs where I dabbled with coding/internet. but then I discovered WPMU (pure awsomeness - so much power without having to worry about dependencies between plugins!!) and working to launch a multisite/prosite network finally on my ideas. I wanted to get some best practices from the gurus here on maintaining the site - dev, test, deploy for mu network - anyways wordpress is not great on that - but a prosite network makes me nervous. I have gone through some documentations : here, here and here. But want to hear directly from the horses mouths..Essentially i want to maintain it in an agile mode, relasease and itrate - hence need the extra insights.