[whpalmer4]

One thing you can do is to go to the Language & Text system preferences and configure your short date format to include the day of the week (probably in the shortened version). Then instead of OmniFocus showing you 10/18/10 in the date column, you would see Mon 10/18/10. Unfortunately, this will affect other applications that use the short date format as well, and that may not be desirable. You'll need to restart OmniFocus after changing the system date formatting preferences before it will have any effect.

Another thing worth noting is that if you hover the mouse cursor over a date field, you'll get a little calendar icon which you can click to pick a date, or just see the calendar without having to switch applications. Click the icon again to dismiss the calendar without making a change.