Rejected Tenchi Storylines- GREAT place to get ideas for your own fanfic!
(This link is separated from the others, mainly because it is not fan fiction. There is no story, just an overall idea.)
FanFiction.net Tenchi Muyo Page- General fanfic site.
Nuriko's Tenchi Muyo Scan and Fanfic Page- His site contains a few stories, as well as some scans from various Tenchi materials.
Death Quaker's Tenchi Muyo Fan Fiction- A great collection of Tenchi fan fiction, mostly about Mihoshi.
The Tenchi Muyo Fan Fiction Archive- This site is full of all different types of Tenchi fanfic. This is definitely not an archive that you can read through in one night!
If anyone has any suggestions or additions to this list, be sure to speak up! =D
When we were young, we lived in the limelight.
Whenever I looked over, my buddies were next to me.
Our world was feverish, red hot.
Far, far away, back in the era of dreams,
we once burned brightly as the sun.