Hello, I'm interested on having Cells running on ABCL. I have downloaded the latest snapshot from the Ramarren branch and it appears that only a few read conditionals are missing (for the MOP package) to make Cells compile and load fine; attached you find the patch.
However, the tests fail due to an issue I had already found the first time I tried Cells on ABCL (see http://www.mail-archive.com/cells-devel@common-lisp.net/msg00582.html). The fix for that is apparently simple - replace delete with remove in c-unlink-used (link.lisp) - but His Kennyness himself said that this naive fix can have a bad impact on performance, so I have not included it in my patch. To me, one sensible option would be to enable the "fix" only on ABCL (it's better to have less than optimal performance than to have no Cells at all!), but it's a decision that should be taken by the Cells developers.
Bye, Alessio Stalla