I wasn't able to understand really quickly what KartMe is offering. That's my biggest hurdle to either using it or telling people.

What would get me to use it would be something that makes it easier, faster, or cooler than tweeting, blogging, or however else I might let people know about this stuff. (Not that I actually do any of those things while working 12h days at a startup.)

Also: name issues. When I see "Kart" i'm thinking "shopping cart" or "mariokart" -- what's the relationship between that and sharing gadgets or recipes? For me at least, you've got a gap right there. The "K" for "C" substitution also gives me "KMart" associations, which probably isn't want you're going for.

Good luck! Don't give up.