It may be bad form to reply to my own post but I'd just like to remind the reviewers that the curved PF track piece needs some more votes. Magnus found a few minor issues that have since been fixed and now it's just sitting there, waiting for a few more votes so it can join its cousin, the straight PF track piece, in the next official release.
;-)
http://www.ldraw.org/cgi-bin/ptdetail.cgi?s=53400
;-)
http://www.ldraw.org/cgi-bin/ptdetail.cgi?s=53400