Version 0.1.0 available at
http://charles.the-haleys.org/calibre/.
The content of the INSTALL file contained in the archive is under the spoiler:
Next steps:
1) add sorting to the UI/templates.
2) make searching more capable (and/or and field name specification).
3) add an option to restrict visible content to the results of a search (a restriction in calibre terms).
4) fix bugs.
Source is on launchpad, in case that is of interest to someone.
If someone actually uses this thing, could you post here? I would be interested in hearing how the installation went, and whether there are prerequisites that I didn't mention. In particular, if you make it work on a cheap web hosting service (or fail to make it work), let me know.