In an interview with the Wall Street Journal yesterday, Yelp CEO Jeremy Stoppelman told the paper that "an IPO is back on the table" for the local reviews site. After accepting a cool $25 million from Bono's investment group Elevation Partners last year, Stoppelman said the possibility of going public was at least a few years off. Despite the fact that the company has yet to report any sort of profitability, Stoppelman doesn't see a reason to seek out another round of private investments. Of course, Yelp still hasn't gotten the break on their payroll taxes they were speaking out about last month, so we'll just take this as a sign that Mayor Lee and the Board's various efforts to play nice with the tech community have gotten these companies to at least pipe down about it.