Storage Area Network Solutions?

TJPile asks: "I work for a larger advertising company with offices all over the US and soon Europe and Asia. Due to our growth in the past year, our current archive/storage system cannot fulfill our needs. Others in my IT team have been talking with Dell about a storage area network. I will be the one administering this system and I was wondering if anyone in the Slashdot community has ever dealt with this before. I know we will be needing some heavy metal along the lines of an SMP Sun or SGI box. We need a system that can support (at max) about 100 simultaneous users working on large image files stored on the server. We also need cataloging software that will allow PC/Mac users to browse documents via thumbnails and job numbers. What do you guys think?" The previous two articles that touched on this subject didn't get much traffic, and were posted at least 6 months ago. Has the intervening time provided more advancements in this area?