A note about the system requirements for N²D. The installer is about 45 meg to download, but the app itself takes up over 440 MB and projects may also explode fairly fast so be prepared for a large peace of real estate usage on the hard disk.  This is largely due to the WordNet and FrameNet databases.

The whole thing is written in C#, the designer in WPF.  So for the time being it is strictly windows stuff (XP or vista). The core neural network and sensory interface libraries should be portable to Mono but the designer will be a tat difficult. I don't know yet how to tackle this one.

With regards to processors I can be simple: the more the better.  This is a massively multi threaded application, so the more cores the faster it should run.  I only have a dual core here, so I haven't had the change yet to see it running on lots of threads simultaneously, but I would love to find out.  As I am writing this, I am sure there will still be a lot of bugs to filter out.

So to recap:

OS: Win XPSP2/Vista
Platform: .net/WPF
Hard Disk: + 450 MB
CPU Cores: as many as you can find