Nows the time to get your start-up going. This kinda compliments my post earlier in the week about the new web bubble: Start your engines, entrepreneurs. Or, if they're already started ... take off the parking brake. If Microsoft's CEO Steve Ballmer is to be believed, then it's a good time to flip a startup. During his Q&A at the Web 2.0 Summit yesterday he made the ballsy claim that the company is prepared to purchase 20 companies a year, for the next five years.