Writer's Block: Legend has it ...

[Error: unknown template qotd]

Sure.

http://www.dagonbytes.com/thelibrary/lovecraft/thecallofcthulhu.htm

but this is a good one, too

http://www.infinityplus.co.uk/stories/colderwar.htm

so's this

http://www.wired.com/images_blogs/geekdad/files/boojum.pdf