+1 on Calibre's flexibility with 'other' readers. I''m still partial to good old CDisplay as a light weight reader myself. CR failed for me precisely because it didn't have server functionality. I guess Calibre spoiled me (no complaints here
I've been 'testing' Calibre's server for comics use as well. With a limited selection it seems to work just fine. I'm now considering adding the rest of my collection as well as over 2000 work papers (document scans archived as cbz), but how will Calibre handle over 75GB in files?