Originally Posted by chasethecat
I'd want to be able to look for more than one tag at once (for example, searching for something tagged "Fantasy" and "ToBeRead", instead of searching just one tag or the other);
I don't think there's any dedicated reader that can do that. My Sony PRS-350 handles collections acceptably. Unfortunately, even among ereader applications, I think Calibre is probably the only one that can do that.