BKNR is tested on SBCL, CCL and CMUCL on FreeBSD, Linux and Mac OS X.
It features a new MOP oriented datastore, a MOP based indexing layer, and an XML import/export layer.
To get BKNR, browse to http://bknr.net/html/getting.html
A very brief assessment of all web frameworks listed in cliki was carried out in September 2010. This assessment comprised: check websites, download source if available, attempt to compile, review documentation.
BKNR was seen as not so much a web framework, more a persistent object framework with some web stuff wrapped around it. Designed for datasets that fit into main memory. Transactions are logged to disk, restart times can be reduced by writing snapshot files.
Documentation of the persistent object framework is reasonably good. However, there was very little documentation of the web framework.
Three example websites were listed, of which one was found to be broken, the other two not very impressive.