Have a peek at the soon-to-be released Triple Bubble Trouble map by Property Shark, as updated through the end of 2007. The good times go-to guide tracks sales volume, average sales price, and foreclosure changes. Judging by this map, San Francisco is luxuriating in a nice, long bubble bath. Nabes such as Upper Market, the Castro, and Noe (for example) are trapped beneath what the Shark calls "Triple Bubble Trouble": Prices and sales figures have dropped, while foreclosures have risen. SoMa and its environs, along with most of the rest of the city, has "Double Bubble Trouble;" prices have dropped, but so have sales. And here we thought we were dealing with chewing gum.