Actually, this might be possible with a few (more) tweaks to Super Search, which currently lets you constrain searches on Date and restrict searches to Notes (aka Replies).

If, as been recommended before, we added:

• The ability to sort super search results.
• Included authors in the result list
• Were able to constrain searches on relative dates, such as:
  • In the last hour
  • In the last day
  • In the last week
  • In the last month
  • and so on
• Were able to link to Super Search results, e.g. the query could be expressed as a GET query

Then, you'd be able to design a Super Search along these lines *and* save it to your Personal Nodelet.

Similarly, you'd be able to some variations on the theme that others might find useful as well.

In the mean time, you might be able to rig your own solution based on tilly's Perlmonks Navigator or epoptai's xNN.

--f