Sprouted grains are still grains. I know sprouting neutralizes some of the phytates but I believe most of the nasty proteins, like gluten, are still intact. I'm sure someone will correct me if I'm wrong on this one.
As for prepackaged sprouted nuts - I'd be leary as the oils in nuts are pretty fragile and go rancid easily. I personally prepare my nuts by soaking and drying out as per the Nourishing Traditions recipe. This makes the nuts more digestible and neutralizes some of the tannins and other not so good stuff. Plus it's cheaper to buy them in bulk & DIY. My fave are walnuts prepared this way. They taste really good.