Could you add a new search request to the search drop down boxes at the top of each main forum category - "My Previous Posts".

To keep the data set size to a minimum it could be defaulted to (say) last 30 days, and an optional check box next to the drop list appearing to give a pick date box for oldest date for the request.

I have often scratched my head "knowing" I posted something earlier that would help a current discussion, but cant remember where it is - most times I find it in the end after a frustrating search, and on quite a few occasions given up.

Regards
Zy