Enhance your resume and your vacation photos with the Mediabistro mothership’s online course in Adobe Photoshop, back by popular demand. In four short weeks (October 17 through November 14) you can get up and running on the program of programs—the subject of many an ethical debate—under the guidance of images whiz Rob Tannenbaum, a photo editor who has worked for The Martha Stewart Show and wields a master’s degree in newsroom graphics management.