As one of the founders of Wakoopa, I know it's really hard to find a good name for your (internet) company AND be able to buy the corresponding domain name relatively cheap.
As people pointed out above, "Google" and "Yahoo" also didn't describe the service they are offering and also are not really pronounceable without spelling. In the end, it's all about the service the company is offering and we're pretty sure that we're doing okay in this department.