The public beta of Gridiron Flow for Mac has been released, and I have to say I'm blown away. I love Curio for project management and brainstorming, but for the nitty gritty of version management, file collection and project source file relationships I'd just as soon have something magically do the job for me. Flow does it quite nicely, at least with Adobe, iWork, Office files and the like. As all-seeing as this software is, it inflicts a remarkably small hit on system resources. Mike Rose filmed a great preview last year, so have a look at that, and at Gridiron's FAQ for Flow, for a better idea of what it does than I could convey here.
The beta is available for download, and currently has no restrictions.
I expect Flow to be a costly bit of software, but I haven't been able to track down any price predictions yet (Update, as pointed out by Nicholas in the comments, it's listed -- fairly obviously -- for $249 right now. About what I expected, really ). For now, have a look and dig into automatic versioning, tag-based organization and project visualization that just takes care of itself. It's especially geared toward designers, and will be of the most interest to those who spend their time with InDesign, Illustrator and Photoshop. Personally, I'm hoping I don't get too hooked on it only to find out it's outrageously expensive. Here's hoping for some pocketbook sympathy!