There isn't much on the web for Nero Wolfe fan fiction besides the Milk & Orchids' archive, and the majority of stories there are NW/AG (as it should be!). There are a few AG/SP stories, but the pairing has never convinced me.
I recently recced some NW in Aerye's LJ: http://www.livejournal.com/users/_aerye_/100986.html http://www.livejournal.com/users/_aerye_/101181.html
Parhelion writes the best NW that I've found, anywhere. She does a good job with Saul, as with all the characters She has a very nice Saul POV story (Liars) and Voices – A Problem Play in Five Drabbles has one Saul POV drabble (though the pairing isn't AG/SP).
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I recently recced some NW in Aerye's LJ:
http://www.livejournal.com/users/_aerye_/100986.html
http://www.livejournal.com/users/_aerye_/101181.html
Parhelion writes the best NW that I've found, anywhere. She does a good job with Saul, as with all the characters She has a very nice Saul POV story (Liars) and Voices – A Problem Play in Five Drabbles has one Saul POV drabble (though the pairing isn't AG/SP).