Just in the past couple of years, local retail phenomenon Groupon has grown so fast it’s been hard to keep track. It seems like one minute it was a scrappy little startup and the next it was bullying the state into multimillion-dollar tax breaks like the big kids. Now, according to a press release that went out this morning, it’s throwing in with concert-industry behemoth Live Nation to form GrouponLive. The release doesn’t say much about what GrouponLive will do: there’s some vague PR-speak about how it will “serve as a local resource for Live Nation events and clients of its global ticketing business, Ticketmaster,” as well as talk of “a new online ticketing deals channel.” I’m waiting for somebody from the company to get back to me, but for the time being it’s not unreasonable to assume that this language means Groupon is bringing its widely replicated deal-making model to the live-entertainment industry.