Apparently the triangular piece of land chosen by the Nickelodeons is a popular one. It’s also one of the parcels the city’s considering in its search to find a site for a new regional jail. In fact, the Highland Park Action Council is getting together tonight to discuss the controversial proposal. Some of the Nickelsville residents plan to attend and “meet the neighbors.” Sounds like they’re settling into their new home. But not for long. Word is that an ultimatum has come down from City Hall. Three days and counting…