There are plenty of questions about whether this new bike-share business model, which is backed by Silicon Valley-style venture capital, will have legs. Will the companies be able to maintain safe bikes, provide good service, and stay financially viable in the long run? It’s too soon to say. But in the early going, they are proving that plenty of people will use bike-share in a city where it previously flopped, reports Tom Fucoloro at Seattle Bike Blog.