The A330 camera does have that capability.
It is in the PictBridge menu, under the 'Date Imprint' option... which has three varieties, either
Day and Time
If you have trouble finding the PictBridge entry in the menu... it's only for adding the stamp to a print from this camera when directly attached to a printer.
So you cannot imprint a date-time stamp on the pictures on this camera, *apparently*. There is a vague hint that it should be do-able, but it is not mentioned in the manual for the camera.
(Do you have any indication that it is possible? if so, a hint as to where you saw such an indication and what it was, might help me find that option - *if* it exists.)
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