I'm a bit confused here. According their page: http://mousouscans.livejournal.com/449.html , they don't allow rehosting on online reader:
This means that there are some changes taking place right now. For one thing, our scans will no longer be available to be hosted on online readers. We ask that you agree to this before you post in our community and download our scans (if this becomes a problem, we will limit membership to only those we approve after speaking to).
They will be semi-permanent hiatus beginning May 2012 and made their files public, but I don't read them changing their policy towards online reader (I've read the comment section too, unless I miss something here).
So could someone confirm their policy?