Getting Started With WordPress MU
We have just started on our first WordPress multi-site deployment, for an in-house project and I can happily report everything has gone very well! WordPress has matured into a sophisticated platform for sites of all kinds, and the multi-site functionality has kept up with this maturity admirably.
Really the only problems we encountered came about through much of the out-of-date documentation still indexed in Google and live on the Internet. Hopefully as time goes by these useless resources are struck off and replaced with relevant content, but until then it’s always best check the publication date before reading any more!