Yes, even this project is still alive! In the meantime, some good soul uploaded scans of all published volumes (i.e. the 5 volumes of Aventurier ~Shinyaku Arsène Lupin~ and the current 4 volumes of Kaitou Lupin-den ~Aventurier~). At this point, all that's missing is the omake at the end of the two compilation volumes of the first manga. Since there's a lot of cultural tidbits in it (mostly Lupin giving an introduction to the Belle Epoque), I might translate it. Well, after I actually catch up with the manga proper.
Chapter 5 - The Escape of Arsène Lupin (part 2)
Look forward to the gripping conclusion of Lupin's grand escape from prison!
Also, as a side-note, Valenglay, the president of France in later books, makes a cameo in this chapter, even though this particular novel doesn't mention him at this point. This doesn't mean that I won't take his scene out of context and turn him into a poster-boy for procrastination. Sorry, Valenglay.