Hello,
A bridge as well as a full integration script are now available for NextBBS (http://bb.militate.com).
Note that if you decide to fully integrate both programs, CPG will still be available from its direct link as well as embedded within NextBBS.
The homepage for the Coppermine-NextBBS integration scripts is at: http://bb.militate.com/?do=ext_wakka&wakka=CpgIntegration
Direct download link for the bridge: http://prdownloads.sourceforge.net/forums/standalone_bridge0.4.1.tgz?download
Direct download link for the complete integration: http://prdownloads.sourceforge.net/forums/ext_cpg0.4.1.tar.gz?download
If you wish to see the integration in action, there is a demo running at: http://bb.militate.com/?do=ext_cpg
If you have any questions, I will be happy to answer them here.
Cheers,
-Chris.