I've looked at the web from both sides now

[mbarker.livejournal.com]

and found some links and links and links :-)

Okay, this is just some scattered links that I want to keep track of. Do a search for science fiction, fantasy, etc. and plot, cliche, whatnot, and you might stumble over:

Assorted generators:
http://nine.frenchboys.net/index.php
http://www.warpcoresf.co.uk/fantasyplot.php

Lists of Plots
http://www.complang.tuwien.ac.at/alex/Handbooks/WWWPlots/genre.html
The Big List of RPG Plots http://www.io.com/~sjohn/plots.htm

Bad Ideas and The Plot That Wouldn't Die and Well-Worn Ideas
http://www.sfwa.org/writing/turkeycity.html
http://www.seetuscany.com/writd/notdie.htm
http://www.strangehorizons.com/guidelines/fiction-common-horror.shtml
http://www.strangehorizons.com/guidelines/fiction-common.shtml

SF Cliches http://www.cthreepo.com/cliche/
Fantasy Cliches http://www.amethyst-angel.com/cliche.html
Horror http://www.darkhart.com/blog/?p=1
Romance Cliches http://www.writing-world.com/romance/cliches.shtml

The Well Tempered Plot Device
http://news.ansible.co.uk/plotdev.html

Evil Overlord List
http://www.eviloverlord.com/lists/overlord.html

Lots of fun to look over.