Verified answer

there are a few manhwas on mangafox.com (translated)

and heres another site (u have to get an account though)

http://www.janimes.com/

Raw Manhwa Scans

I know plenty! But none of these are online reading, all downloading zip pretty much...sorry!

Here's a website that has A LOT of manhwa's (this one is particularly my favorite): http://kiligaris.livejournal.com/

Here's some others too:

http://rukiagiugiu14.livejournal.com/

http://sakuyakamui.livejournal.com/

If you have a esthetique username for their forum, you can go there and they have a special place for RAW manhwa...and there you will find a BIG selection. It's even bigger then the first link I gave you of kiligaris.

I hope I was of some help! :) Enjoy