John Matejczyk, who joined Fallon/Minneapolis last year as group creative director on the Citibank business, is returning to Goodby, Silverstein & Partners as an associate creative director, overseeing HP's consumer marketing. ... Venice-based edit house Spot Welders has announced plans to open a New York office in February 2005. Longtime Mad River Post editor Dick Gordon will head the office and serve as lead editor. ... Twist Audio, which will function as a satellite office of audio house Sound Lounge, has launched in the former location of Loredo Audio Post at 333 Hudson Street in New York. The shop will be manned by mixers Glenn Laredo, Peter Buccellato and Mark Schultz, all formerly of Laredo.