WHAT A PLACE AT THE SOVEREIGN WILL COST YOU A couple of readers have written in noting their own sticker shock at the pricing announced for the 290 apartments at the still-under-construction 21-story Sovereign at Regent Square tower. One bedrooms will start at $2070 a month, two bedrooms at $3070, and studios at $1615. A temporary leasing office run by Boston-based Windsor Communities will open in a couple of weeks; the first units at 3233 West Dallas St. should be ready for occupancy by July 15th, the company says. [Swamplot inbox; previously on Swamplot] Photo: Alonso Ortega