Hello,
version 0.7.0 of BicBucStriim was just published. BicBucStriim is lightweight PHP/JavaScript application that makes a Calibre library accessible for ereaders/touch devices via HTML -- tested with Kindle Keyboard, iPhone, IPad.
BicBucStriim was made for internal use on a low-power NAS, similar to media servers for audio and video. So your Calibre library is always online, even when the PC with Calibre is shut down.
BicBucStriim provides browsing, searching and downloading.
For more info (and pictures) check
http://rvolz.github.com/BicBucStriim/
Rainer