Skitch should allow image history sorting/tagging

I absolutely love Skitch. I think it's the fastest way to snap, clip, edit, and share anything while I'm searching the web. However, I do think that the storage of past images should be improved. I am currently not aware of any way to categorize, sort, or quickly search through the past images I have taken. If I am just ignorant, then please educate me, but otherwise, Skitch should improve on its incredible usefulness by allowing a way to sort one's image history, such as through picture tags.
Thanks!