[SpiralOcean]

Just a thought here:

The way I handle this currently is:
I have a folder on the mail server called 'hold for processing'
When I come across a message I need to be on the desktop to process or a mail I want to add to OmniFocus, I move it to this folder. This gets it out of my inbox and when I'm at the desktop I can clip it to OmniFocus.

I don't know how much work this would be for omnigroup, but if there was a way for me to designate a mail folder for OmniFocus to process items into the inbox, OmniFocus could log into the server, check the mailbox folder, and add items in that folder to the inbox. Or clip items from that folder into the inbox.