> Not for PHP/Perl, but I've copied to the development list for SRW to
> see if anyone has done any work in this area. I seem to recall that
> Eric Morgan at Notre Dame was using Perl?
I've seen a simple SRU server that Eric wrote. As part of the Ockham 
project we're looking to create SRU client/server modules in Perl. In
addition if we have time we're going to try to port Mike's CQL-Java to Perl.
Unless of course this has already been done :-)
If you are interested in collaborating on this, or want to keep tabs on how
we're doing let me or Eric know.