One keypress workflow for waiting for emails?
 

Aim: With just one step/action - get a 'Waiting For' type email out of my mail inbox, filed in my 'waiting for' mail folder, with an entry in my 'Waiting for' list in OmniFocus.

Ideally a solution would exist for Mac, iPhone and iPad (I suspect slightly different on each platform). I want to use the 'touch it once' philosophy to empty the inbox. My 'email' normally breaks down into:[LIST][*]do now (<2 minutes)[*]do later (action is with me)[*]waiting for (action is with them)[*]delete[*]add to my reading queue[/LIST]
The Omnifocus MailDrop feature (forward the email to my dedicated email address on the omni sync server) works to get it into my OmniFocus inbox, but then requires a second process to drop it into the 'Waiting for' context (and project - but that is less important to me at this stage as a daily task of setting projects to unallocated waiting for items as part of the 'have they responded yet' admin is OK)

What workflows do you use? What would you suggest?