[pquerna]

Disclaimer: I work at Cloudkick.

Hopefully Cloudkick counts :)

But generally, the b2b space has much less splash and attention, partly because you generally need far fewer paying customers to be profitable compared to a consumer based business. Most consumer based businesses need to get millions of uniques to be considered successful, while a b2b application with 1000 paying customers can easily be pulling in more money, but has far less notoriety.