The stuff Power cast (http://www.powercastco.com/) makes seems ideal for some of the things Sparkfun clients make. You can buy this stuff through Mouser et al., but it’d be nice to have some SFE-style boards, breakouts, tutorials, etc. The development kit, especially, is quite pricey, so maybe a scaled down version for SFE? Probably still far from cheap, but it’s just a really neat tech…
If there are other products that do similar things, I’d love to see them too.