Since CS4 (I think...or CS5...) there is the option to display the shot date.
On the bin window click it's context menu button (the upper right one) and choose Metadata display... then choose under Dynamic Media->Shot Date.
If this doesn work with your files, then try the Basic->Date Created choice under metadata too.
This will display on your bin the date of the shooting. It works perfectly with dv tapes captured via firewire. Please note that if the tapes being captured are dubbed tapes, they should be dubbed via firewire too, to maintain metadata. Any other way the metadata will be lost.
