I don't know if anyone else is looking for export functionality from Lightroom to Pbase but I found a link to a tool here http://www.tinderboxdesign.com/PBasic-20090223-v1r2.zip
It doesn't have all the functionality of Jeffrey Friedel's plug-ins for Facebook, Zenfolio, etc., but it gets the job done.
http://www.pbase.com/pdx_photoman/blog
Jim Lewis
Lake Oswego, OR