I just uploaded uploaded clipbox to packal http://www.packal.org/workflow/clipbox
It lets you take a screenshot, upload it to trello, and get a link to the file back. Suggestions and changes accepted at https://github.com/bgschiller/alfred-clipbox
Keys Action
⌘⇧X Take screenshot
⌘⇧G Begin screen recording
⌘⇧C Upload clipboard text or file