I've been constantly updating the C-Pop Collection. I won't list down the links here because it's rather lengthy. So do check this section out: http://sheets-collection.blogspot.com/2010/01/c-pop-piano-sheets-collection.html
I'm still in the midst of updating it. Converting the files into PDF format and merging them together before uploading them on to Mediafire.
Edit: I've updated Yiruma Collection at - http://sheets-collection.blogspot.com/2009/06/yiruma-piano-sheets.html, with "As You Wish", "Passing By", "The Moment" & "With The Wind".
Have a good day/evening.