John Battelle just got jiggy to the fact MySpace.com is offering a Craigslist-like classified advertising service. Given MySpace's astounding growth (see this week's BusinessWeek story), maybe it's time for Craigslist founder Craig Newmark to give some serious thought to doing an IPO or selling out. The hounds  (a.k.a. Rupert Murdoch's News Corp.) are barking at the door so perhaps the time is right/ripe for Craig to shuck his quasi-public service philosophy and give himself some financial muscle for whatever he wants to do or fund next. It's just a thought but what do you think a site with nine million unique visitors is worth?