Next bubble? It'll take a while to get going but maybe alternative energy, its got a lot of the precursors. A lot of bubbles come from new industries (dot.com) or are under regulated (present mess) and are subject to creative financing and incentives. If it happens it'll be a real pity for the alternative energy bubble to bust...it'll be something that sours Americans once again, and its something useful, something we need, not $300 million going to investment bank presidents (Goldman Sachs) and a internet start-up called "Angry Monkey" .