These more recent projects also made Lisp machines in FPGAs. It looks like they got further than the original post here:

LispmFPGA (2008) http://www.aviduratas.de/lisp/lispmfpga/

https://groups.google.com/forum/?fromgroups=#!topic/comp.lan...

IGOR (2008) http://opencores.org/project,igor

https://www.flickr.com/photos/kaitorge/sets/7215760944571932...