I've just filed the last 64bit-specific patch we have in ooo-build to IssueZilla... This does not mean that porting OpenOffice.org to x86-64 is over, but when all the patches get approved & integrated (lots of them already are - in CWSes sixtyfour01-04, long2int, intptr, numberformat, dxarray, etc. to note the big ones), one should be able to get a 64bit OOo without much trouble. Of course, no-one says how much it will work for you ;-)
Maybe it is too soon to celebrate, but I should note that this wouldn't happen without Caolán and Pavel (and their patches), and of course without people originally working on the port in ooo64bit02 CWS. Thank you!