Here are Hopefully ALL the Tenchi Muyo Midis! If I am missing any feel free to e-mail me with the URL and name of the song and I will put it up here!

Tenchi TV Theme
I'm A Pioneer
Tenchi OAV Opening Theme
Talent For Love
Aeka's Theme
Star Dream
Ryoko's Theme
Achika's Theme
Pretty Sammy Theme
Washu's Theme
Ryo-Ohki's Theme
Mihoshi's Theme
Mayuka's Theme
Shin Tenchi/Tenchi In Tokyo Opening Theme
Reminice
Manatsu No Eve/The Daughter Of Darkness End Theme
Shin Tenchi/Tenchi In Tokyo End Theme