Yes I also would like this. I have recently looked at another zip utility, Springy, and I while I wouldn't suggest you develop your app necessarily based on what other people are doing it has a really rich contextual menu, almost too much in fact.

Sometimes I have zips etc that I know I don't need to browse, just need to extract them quickly. Often, I also know 100% that once extracted I will discard the archive, so a contextual extract-and-then-delete-archive would save me a lot of time!

Thanks, John