IPFS can run in browser, and the only thing most of the rest of this does besides talking is hashing. It should run just about anywhere that has half a gig of ram and a cpu. Of course the thing we're trying to share is the hard drive space, and for full setups you'll need a little more buffer room to manage file uploads.
We're very interested to see what the lower requirements are.
RE: SPK Testnet Node Setup Guide