Does anyone know of where I could find vegetarian ramen - something with a veggie/mushroom based broth? Fish based broth is okay too. I am willing to go pretty much anywhere in LA or OC to try some good (non-meat) ramen.
I'm pretty sure the ramen at San Sui on Hilhurst in Los Feliz is vegetarian. It's not great, not bad though - has lots of veggies and tofu, and is surprisingly spicy.
Mr Ramen, in Little Tokyo, offers a vegetarian (no pork, no bonito) stock you can substitute for any noodle dish on the menu. I recommend the curry one. If you expand your horizons towards Chinese noodle dishes, Bean Sprouts Cafe in Arcadia makes a real good vegetarian "beef" noodle soup. And they make a mushroom broth for the vegetarian soups at Pho Cafe in Silverlake.
Kansai, mentioned in the other thread, is pretty good. Very salty, possibly lots of MSG, but not bad. The gf and I have gone to Takeshi in Glendale, which has a broth they claim is vegetarian. It was pretty good... not sure how much I trust that it was veg, but worth checking out.
If you eat fish, you should be able to eat ramen at a lot of places - lots of broth is made with just kombu and bonito. I don't have any good specific recommendations though.
In addition to the other recommendations for Chinese and Vietnamese noodle places, you could try Indochine in Glendale - I think their broth is better than Pho Cafe's, though the vegetables aren't that great. Also, there's a veggie Vietnamese place waaay south on Rosemead - forget the name, but you can find it on this forum. And Tea Shaker, a vegetarian restaurant which is now in El Monte, has some good soups.