I'm looking for a word that suggests both a place where new things can arrive and where you can safely store things, but where you wouldn't want to keep things that you are actively working on.
In particular, I'm designing an email "diet" system to help email addicts and I want to suggest to people that their [word] is a combination of the inbox and the archive. The closest thing that comes to my mind is "log" or "record" but that isn't good because it doesn't sound quite right to move something out of the log and on to the to-do list, which is a key step in this system's success. The log sounds more like a place that would be kept in addition to the inbox and whatever else, not as a place to move things in and out of. Analogies to real-world places like basement or icebox, if appropriate, would also be fine.