It’s a webcomic called Kitty Hawk, and it looks nicely pulpy. It’s also just getting started, so there’s not the usual “five million pages of backstory to get through first” to worry about. Although that may not be a selling point.
PS: I should note that Sky Captain and the World of Tomorrow is probably the best pulp-evocative movie that we’ve had recently, and that Adventure! still does the best job at recreating pulp-era adventures for roleplaying games. I welcome arguments otherwise.