Sebastian writes: "Version 1.0 of the YAZ proxy [1] has been released. The major version jump signifies that the software is robust and has been thoroughly hardened in production. The YAZ Proxy can be used for a number of different purposes, but perhaps one of its most interesting features is that it can make any Z39.50 server look like a (SRU/SRW) webservice. If you have a Z39.50 server you'd like to access but you're intimidated by the protocol, use the proxy and you can submit queries like this [2]
and get results back in XML. A SOAP-based protocol (SRW) is also suported. The proxy is used by the Library of Congress and other major libraries."
Links:
[1] http://www.indexdata.dk/yazproxy/
[2] http://www.loc.gov/z39voy?version=1.1&operation=searchRetrieve&query="open source"&recordSchema=dc&maximumRecords=2