I would like to be able to use today\'s date in a calculated column in a SharePoint list to, for example, determine whether a task is overdue. There is a well-documented tr
In addition to Christophe's (PathToSharePoint)'s article this also covers the Today trick and why it doesn't work
The Truth about using Today in calculated columns
There are a number of fudges, probably the best one is Dessie's console app (mentioned above by MNM)
Dynamically updating a SharePoint calculated column containing a Today reference
Its good but its not perfect, for example you may have to worry about different timezones.
Before going down this route you should ask yourself if you really, really need to do this. For example :-
If you want a countdown (days overdue/days left to complete a task) then you can use SPD and a XLST Data View web part
If you want a view to show overdue items or items created in the last X days ec then you can use [Today] in a views filter 2