Magically clean inbox

I just found a cool trick for cleaning out your gmail inbox. When I started my gmail account the transition from folders to lables was akward and I had so much space it didn't seem like I'd ever use it. But now that I'm a GTD convert (sort-of) it really bothered me that I had 10k emails in my inbox. So I deleted some obvious spam and then archived the rest (see: http://www.ainotenshi.org/cleaning-up-your-gmail-inbox). Now my historical email is still there, and I can process the rest as it comes in by labeling and archiving if I want to save it. But I delete a lot more email than I used to and the satisfaction of having the Inbox at 0 messages is huge!