A 'snooze' button for your emails
blog.taskforceapp.com
blog.taskforceapp.com
I love being able to defer emails until a specific time. I use it for the smallest things - deferring "poke" messages on Facebook to slow down the poke war - to any email I need to remember later, but don't have everything I need at present.
So, sorry this isn't specific feedback at this time, but hopefully it'll still help. ;-)