I have to say that after buying a half dozen apps in my search or a Stanza replacement, I am pleasantly surprised by Readme.
It's simple, it's fast and besides doing a beautiful job with the ePub rendering, it also seems to be great at PDF too.
I was able to point it to the calibre web interface and load my books into it with no fuss. Simply point it to
http://server address:8080 (no /opds at the end) and browse the calibre catalog in HTML.
The colors are very configurable and there's an icon in he toolbar to switch between day/night directly as well as options to configure full screen (no phone status bar) or not (show phone status bar).
Likewise, seems like every installed font is available for use.
Tap zones are configurable, but not as much as they should be. There are preset ways to set them, but are not individually user configurable, like stanza.
The library view is better than Bluefire's but seems to have trouble with HTML in the book description fields.
All in all, a very worthy first effort.
Cheers
Art