Just because your current job isn't in a sexy or trendy industry doesn't make it bad. You can learn a lot about working with people and business even if you're somewhere in the bowels of a large multinational corporation. I know I have. Also, there are really excellent developers in companies like that, too, not just in startups in the valley. Even if this job isn't for you, a couple years in a place like that isn't very long in big scheme of things. You might get ideas for some sort of B2B startup that you wouldn't have otherwise.